Apple Technician Guide iMac (27-inch, Mid 2010) 2010-09-09
Apple Inc. © 2010 Apple Inc. All rights reserved. Under the copyright laws, this document may not be copied, in whole or in part, without the written consent of Apple. Every effort has been made to ensure that the information in this document is accurate. Apple is not responsible for printing or clerical errors. Apple 1 Infinite Loop Cupertino, CA 95014-2084 USA + 1 408 996 1010 www.apple.com Apple, the Apple logo, Mac, and Macintosh are trademarks of Apple Inc., registered in the U.S.
iMac (27-inch, Mid 2010) Contents About This Guide Updates 10 Updated 9 September 2010 10 Updated 9 August 2010 10 Apple Technician Guide introduced 27 July 2010 10 Feedback 10 Basics Overview 12 Identifying Features 13 Product Configurations 13 Safety Precautions 14 Serial Number Location 15 New Accessories 16 Magic Trackpad 16 Apple Battery Charger 18 Troubleshooting General Troubleshooting 20 Wireless Troubleshooting 20 Update System Software & Firmware 20 Troubleshooting Theory 20 Hardware vs.
LED Functions 30 LED Startup Sequence 31 Logic Board Test Points 32 Functional Overview 33 Block Diagram 34 Symptom Charts 35 Startup and Power 35 No Power, Dead Unit 35 Won’t Start Up 37 Intermittent Shutdown 39 Kernel Panic, System Crashes 44 No Video 46 Corrupted Video 48 Burnt Smell/Odor 51 Uncategorized Symptoms 52 Display 53 Backlight Issue/No Backlight 53 Noise / Unstable Flickering 55 LCD Image Issues 58 Incorrect/Missing Colors 60 Distorted/Blurred Image 62 Pixel Anomalies 64 Vertical/Horiz
Audio: Built-in Speakers Have Distorted Sound 97 Audio: No Audio from Built-in Speakers 98 Camera Issues 101 FireWire Device Not Recognized 102 USB Device Not Recognized 104 Wired Keyboard Does Not Function Properly 106 Keyboard: Specific Keys Do Not Respond 108 Wired Keyboard/Mouse Not Recognized 108 Wireless Input Device Does Not Pair 110 Apple Wireless Mouse/Magic Trackpad Erratic Tracking 113 Wireless Input Device Loses Connection 114 Apple Battery Charger Does Not Charge Batteries 116 Mechanical 118
Camera 144 Removal 145 Reassembly 146 LCD Panel 147 Removal 148 Handling the Panel Reassembly 154 153 Vertical Sync Cable (Vsync) LED Temp Sensor Cable DisplayPort Cable AirPort Card 158 159 Audio Ports and Cable AirPort Antenna 157 161 163 165 AirPort Carrier Board 167 AirPort Cable 169 Bluetooth Antenna Bluetooth Board 173 LED Backlight Board Power Supply 171 175 177 Removal 178 Reassembly 179 Backlight Pressure Wall 180 Power Supply/Hard drive Pressure Wall Removal 183 Reassemb
Reassembly 193 Optical Sensor Cable Optical Drive Fan 195 197 SD Card Reader 199 Removal 200 Reassembly 201 SD Card Reader Cable IR Board and Cable Logic Board 202 204 206 Removal 207 Handling the Logic Board Reassembly 210 Video Card 209 216 Solid State Drive (SSD) 219 Removal 220 Reassembly 222 SSD Data Cable 223 Optical/MXM Pressure Wall Hard Drive Data Cable Optical Drive Data Cable Battery 227 230 232 Removal 233 Reassembly 233 Right Speaker 234 CPU Fan 236 Removal 237 Reasse
Stand 248 Removal 249 Reassembly 250 Mechanism 252 Bluetooth Cable 254 Camera Cable 257 Cable, AC/DC Power/Backlight/SATA 260 Cable, AC/DC Power/Backlight/SATA, SSD Microphone Cable Rear Housing 266 Reassembly 267 262 265 Additional Procedures Retrieving Mechanism 272 Views Exploded Views 277 Exploded View #1 Exploded View #2 Exploded View #3 External Views 277 278 279 280 Rear View 280 Ports 281 Internal Views 282 Photo of Components below LCD 282 Photo of Components in the Rear Hou
Apple Technician Guide About This Guide iMac (27-inch, Mid 2010) © 2009 Apple Inc. All rights reserved.
Updates Updated 9 September 2010 Troubleshooting: • Display: several symptoms: Modified steps to allow unit to warm up for about a minute (instead of 15 minutes) before evaluating front-of-screen performance. Take Apart: • LCD Panel: Added note that overtightening screws could lead to issue of light leakage after unit is reassembled. • Camera and Rear Housing: Added note that white thermal paste intended for camera should not be used for any other purpose (such as portable computer heatsinks).
Apple Technician Guide Basics iMac (27-inch, Mid 2010) © 2010 Apple Inc. All rights reserved.
Overview Introducing the iMac (27-inch, Mid 2010) with the latest Intel Core i3, Core i5 and Core i7 processors and powerful new graphics. The new iMac line is the fastest ever with dual-core processor speeds up to 3.6 GHz, quad-core speeds up to 2.93 GHz and discrete graphics including the powerful ATI Radeon HD 5750. The processors feature an integrated memory controller to access the system memory directly, allowing the new iMac to take full advantage of its faster 1333 MHz memory.
Identifying Features The iMac (27-inch, Late 2010) computer features include: • 27-inch display 2560 x 1440 LED-backlit display • Increased processor speeds: • 3.20 GHz Intel Core i3 with 4MB shared L3 cache • 2.80 GHz Intel Core i5 (CTO) • 3.60 GHz Quad-Core Intel Core i5 with 8MB shared L3 cache • 2.
Safety Precautions WARNING: HIGH VOLTAGE: The AC/DC power supply PCB remains powered up whenever the system is plugged in, whether or not the system has been turned on. Use extreme caution when troubleshooting the system with the front bezel removed. Important: If the computer is shut down by removing the power cord, allow the power supply a good 2-3 minutes to discharge the capacitors before handling it.
Serial Number Location The iMac (27-inch, Mid 2010) serial number is located on the base of the stand. When replacing a stand, transfer the serial number to the new stand.
New Accessories Magic Trackpad The wireless Magic Trackpad uses Bluetooth® technology to connect to the Mac and comes with two AA batteries installed. To use the Magic Trackpad and its full features, update your Mac to Mac OS X version 10.6.4 or later, and then install the latest trackpad software using Software Update, if needed. Refer to the Magic Trackpad Quick Start Guide for more information.
Pairing the Magic Trackpad To pair your trackpad: 1. Choose Apple () > System Preferences, and then click Trackpad. 2. Click “Set Up Bluetooth Trackpad …” in the lower-right corner. 3. Press the On/off button on your trackpad to turn it on. 4. Click Continue when your trackpad is detected. Once your trackpad is paired with your Mac, use Software Update again to make sure you have the latest software installed.
Apple Battery Charger Use the Apple Battery Charger to charge rechargeable NiMH batteries for your Apple products that use AA batteries. Each Apple Battery Charger comes with six high-performance AA NiMH batteries: two for your keyboard, two for your mouse or trackpad, and two for charging. You can use the Apple Battery Charger to charge either one or two NiMH rechargeable batteries. To charge batteries fully, allow at least five hours of charging time.
Apple Technician Guide Troubleshooting iMac (27-inch, Mid 2010) © 2010 Apple Inc. All rights reserved.
General Troubleshooting Wireless Troubleshooting If you’re having issues with Bluetooth and wireless connectivity issues, refer to the following: • TS3048 Troubleshooting wireless mouse and keyboard issues • HT3887 Wireless input devices: Bluetooth frequently asked questions • HT1365 AirPort and Bluetooth: Potential sources of interference for wireless devices and networks • HT3903 Apple Wireless Keyboard and Mouse: How to install batteries • HT4273 About Apple Magic Trackpad Update 1.
Hardware vs.
Resetting the System Management Controller (SMC) The System Management Controller (SMC) is a chip on logic board that controls all power functions. If computer is experiencing any power issue, such as not starting up, not displaying video, sleep issues, battery management, or fan noise issues, resetting SMC may resolve it. To reset SMC on an iMac: 1. Shut down the computer. 2. Unplug all cables from computer, including power cord. 3. Press and hold the power button for 5 seconds. 4.
Starting Up in Safe Mode A Safe Boot is a special way to start Mac OS X when troubleshooting. To start up in Safe Mode: 1. Make sure computer is shut down. 2. Press power button. 3. Immediately after you hear the startup tone, press and hold Shift key. Note: The Shift key should be held as soon as possible after startup tone but not before. 4. Release Shift key when you see the screen with the gray Apple and progress indicator (looks like a spinning gear).
Removing the Battery, Measuring DC Voltage 1. Unplug the computer. Allow several minutes for power supply to discharge. 2. Remove logic board. 3. Remove coin battery for 1-2 minutes. The coin battery is located on the back side of the logic board (see graphic below). 4. Measure DC voltage on battery touching battery with red probe, and grounding with black probe. If voltage is 2.7v or less, replace battery. 5. Reinstall the battery and logic board. This will reset the logic board. 6. Power on computer. 7.
Diagnostics The following diagnostics are required for this product: • Apple Service Diagnostic (ASD), version 3S140 • For iMac (27-inch, Mid 2010): Apple Hardware Test (AHT), version 3A202 • Bluetooth Service Diagnostic (BSD) 1.1 Sensors Errors Run latest available service utilities to determine if any thermal sensors or blowers are malfunctioning. When a test reports an error, reseat appropriate connections and check that all air flows are free from obstruction.
2010-09-09 TS2P Excessive upper internal enclosure temperature, or Skin temp sensor damaged/ disconnected from top of logic board. Verify that the skin temp sensor cable is securely connected to the top of the logic board and sensor is attached to rear housing (near the camera). Replace the sensor cable if damaged.
Sensor Locations Temp sensors and fan connector locations are shown in the next two graphics. Ensure cables are correctly routed and the sensors and fans are properly connected. If a sensor or fan is faulty or not connected, Apple Hardware Test will generate an error code.
Sensor Connector Location: Back Side of Logic Board 2010-09-09 iMac (27-inch, Mid 2010) — General Troubleshooting 28
Diagnostic LEDs The iMac (27-inch, Mid 2010) computer has four built-in diagnostic LEDs on the main logic board that can help you to troubleshoot the computer. The LEDs are located on the bottom left edge of the logic board (under a piece of black mylar tape) and can only be seen when looking through the lower vents of the enclosure. Refer to the next page for a close up graphic of the troubleshooting LEDs.
LED Functions LED #1 • Indicates that trickle voltage from power supply has been detected by logic board. This LED will remain ON whenever the iMac is connected to a working AC power source. The LED will remain ON even when computer has been shut down or put to sleep. The LED will remain OFF only if the AC power source is missing or disconnected , if the logic board is disconnected from the power supply, or if the power supply board is faulty.
LED Startup Sequence LED #1 = Power available. If no LED is visible: • Verify AC power source • Verify known-good AC cable is connected • Verify cable connection between AC inlet and power supply • Verify cable connection between power supply and logic board • Verify power supply LED #1 + LED #2 = Power available, and system is powered on.
Logic Board Test Points Some test points are accessible on the logic board when the LCD panel is removed. The test points are defined below. Logic Board Test Point Function 2010-09-09 Pin 1 Ground Pin 3 5V power for Hard Drive(s). Note: If present, the 12V power will come directly from the Power Supply to the Hard Drive thru the power harness cable.
Functional Overview Refer to this diagram for symptoms related to logic board connectors. To rotate this page in Preview for easier viewing, go to Tools menu and choose “Rotate Left”.
Block Diagram K22/K23 System Block Diagram 09/01/2009 David Cox Apple Confidential Refer to this diagram to see how modules are interrelated. Optional SSD drive Optical Drive Backlight Controller Hard Drive MXM AC/DC Temperature Sensor Temperature Sensor Display AC Inlet Camera Temp Sensor IR Sensor SD Card Reader Microphone MLB Fan Fan Fan Bluetooth Antenna Speakers 802.
Symptom Charts Follow steps in the order indicated below. If an action resolves the issue, retest system to verify. Startup and Power No Power, Dead Unit Unlikely cause: speakers Quick Check Symptoms Quick Check No Power, Dead Unit • No power • No fan spin • No startup chime • No image on external display • No hard drive or optical drive activity • Caps Lock LED on wired keyboard doesn’t light when pressed. 1. Verify power source. 2. Verify power cable. 3.
3. Press power button while monitoring diagnostic LEDs. Verify if LED #2 turns ON and remains ON after pressing the power button. You may alternately check for a power request signal between pin 12 and pin 1 of logic board. Yes Power supply functioning and logic board detects supply voltages. Go to Won’t Start Up symptom flow. No Go to step 5. 4. Disconnect AC cable.
Won’t Start Up Quick Check Symptoms Quick Check Won’t Start Up • No startup chime. • Error tones during startup. • Grey screen with fan noise, or other noise. • Will not progress beyond Apple logo or spinning gear. 1. Isolate OS by starting up from original install media for this computer, from a same-model computer in Target Disk Mode, or from a compatible known-good OS on an external drive. Both AirPort and Bluetooth services are available when booted from the Install disk. 2.
3. Wait 15 seconds after computer was powered down then disconnect AirPort cable from logic board. Verify if computer starts up properly now. Yes Go to AirPort Card Kernel Panic symptom flow. No Go to step 4. 4. Startup with Alt key to select and start from the Install DVD inserted in the optical drive, or from an external bootable volume connected. Verify if computer starts up properly from alternate bootable volume. Yes Go to Hard Drive Not Recognized symptom flow. No Go to step 5. 5.
Intermittent Shutdown Troubleshooting Shutdown Causes Always run the latest available Apple service utilities to check for any abnormal value reading from a thermal, a voltage, or a current sensor, or from a fan speed meter. The log files may also report the cause of a previous shut down(s). Collect all available info from user on shut down occurrence details: periodicity, power state when issue happens, running applications, running time before shutdown.
3) Power-related system shut downs: • External power source was removed. Power-related shut downs are due to power management, poor connections, or defective power sources.
Quick Check Symptoms Quick Check Intermittent Shutdown • Powers off during startup. • Powers off during desktop use. • Computer restarts spontaneously. • Powers off when waking from sleep. 1. Make sure that power cord is securely attached to the back of computer, and is not hindered by a desk or other furniture. 2. Plug computer directly into an AC outlet to test if a surge protector or UPS is causing issue. 3.
Deep Dive Check 2010-09-09 Result Action 1. Activity related shutdowns: Reset SMC and PRAM and verify that shutdown issue still happens. Yes Check with known-good bootable drive: go to step 2 No Shutdown cause was related to SMC or PRAM programmed shutdown settings or corruption, and was resolved by reverting them to default settings. 2. Booting from known-good bootable drive , verify that shutdown issue still happens.
7. Replace DC power cable, which supplies power to logic board, hard drive, and LED backlight board. Verify if system continues to restart or shutdown. Yes Go to step 8 No Issue resolved with DC power cable replacement. 8. Hardware-related shutdowns: Run latest available Apple service diagnostics and verify if a sensor failure is reported. Yes -If a temperature or a fan sensor failure is reported, go to step 9 9. Verify if a thermal sensor or fan failure is reported by diagnostics.
Kernel Panic, System Crashes Quick Check Symptoms Quick Check Kernel Panic, System Crashes • Kernel Panic on startup or desktop use. • System freeze during use. • System freeze upon wake from sleep. 1. Isolate OS by starting up from original install media for this computer, from a same model computer in Target Disk Mode, or from a compatible known-good OS on an external drive. Both AirPort and Bluetooth services are available when booted from the Install disk. 2.
3. Use known-good SDRAM in the system. Verify if system start without kernel panic now. 2010-09-09 Yes Install user’s SDRAM one by one and retest. If kernel panic repeats, replace affected SDRAM. Verify if correct SDRAM specification is being used. No Go to step 4. 4. Wait for 20 seconds after shutdown and disconnect AirPort cable on logic board. Verify if system starts without kernel panic now. Yes Go to AirPort Card Kernel Panic symptom flow. No Go to step 5. 5.
No Video Unlikely cause: hard drive, optical drive, speakers, camera, microphone Quick Check Symptoms Quick Check No Video • No image. • Backlight failure. 1. Check brightness setting. 2. For no-video issues, connect an external display to Verify if iMac video circuitry is functioning. If image appears on external display go to Backlight Issue/No Backlight symptom flow. 3. Reset SMC. Deep Dive Check Result 1. Verify boot chime present and fans running when system powered ON.
4. Pivot enclosure to access lower intake vent, and locate diagnostic LEDs on edge of logic board. Verify if LED #3 turns on shortly after system powers on. 5. Locate diagnostic LEDs on logic board. Verify if LED #4 turns on shortly after system powers on. 6. Locate diagnostic LEDs on the logic board. Verify if LED #4 turns on shortly after system powers on. 2010-09-09 Yes Logic board communicating with video card. Go to step 5.
Corrupted Video Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Corrupted Video • Text and graphics appear fuzzy • Image corrupted 1. Using the KBase article http://support.apple.com/ kb/HT1159 , verify Mac OS X version installed is the build number supported on the hardware. Make sure customer didn’t migrate over their old version of Mac OS. 2. Set System Preferences > Displays to native resolution of LCD.
Deep Dive Check Result 1. Boot from Install DVD and Verify if issue is still visible. Yes Go to step 2. No Issue likely caused by software or driver issue. Troubleshoot for software issues. Make sure all software and firmware updates have been installed. 2. Verify if issue is visible on an external display. Yes Issue is NOT caused by internal LCD display. Go to step 3. No Go to step 6. 3. Remove video card, inspect connector for damage or corrosion. Reinstall video card and retest.
7. Disconnect DisplayPort cable between LCD display and logic board, and verify if there is damage to cable or connectors. Repeat with vertical sync cable connected between LCD panel and LED backlight board. Yes Replace DisplayPort cable or any other damaged part/ module. No Reinstall DisplayPort cable and vertical sync cable. Go to step 8. 8. Verify if issue is still visible after reinstalling/replacing DisplayPort cable and vertical sync cable.
Burnt Smell/Odor Unlikely cause: speakers, microphone, rear housing Quick Check Symptoms Quick Check Burnt Smell/Odor • Burning smell • Unusual odor 1. Verify that computer is the source of the odor. 2. If system is new, see kBase #TA22044: New Equipment: Odors May Be Present Short-Term. 3. Disconnect all third-party devices and check to see if any external device is the source of odor. 4. Inspect air intake and air outlets for obstructions.
3. Verify if source of odor can be located using your nose. Yes Check all AC and DC power cables for pinch or damage. Replace affected module(s) and retest system. No Contact Apple for assistance if you feel that there is a possible safety issue with computer that has not been resolved in previous steps. P08 Uncategorized Symptoms Quick Check Symptoms Quick Check Uncategorized Symptoms • Unable to locate appropriate symptom code. 1. Make sure system is plugged into a known-good outlet. 2.
Display Backlight Issue/No Backlight Unlikely cause: hard drive, optical drive, speakers, camera, microphone Quick Check Symptoms Quick Check Backlight Issue/No Backlight • No image • Partial backlight failure • Backlight flickers • Display dim 1. Check for Software Update. 2. Verify that System Preferences > Displays > Brightness control setting is above minimum. 3. If no image on built-in display, connect external display to verify if iMac video circuitry is functioning.
5. Shine bright (low heat) flashlight onto front of LCD. With computer powered ON verify if a faint image is visible. Yes LCD panel functional but backlight is missing or dim. Remove LCD panel and inspect and reseat the following cable connections: -Backlight power cable between backlight board and LCD panel. -Vertical sync cable between backlight board and LCD panel. -DC power cable to backlight board and power supply. Replace any damaged cable. Reinstall LCD panel and go to step 6.
Noise / Unstable Flickering Unlikely cause: camera, microphone Quick Check Symptoms Quick Check Noise / Unstable Flickering • Flickering image • Horizontal bands of static intermittently appear • Dock and / or menu bar shift positions • Display intermittently flashes on / off • Unstable image • Humming noise from display • High frequency noise from display 1. If display flicker only occurs when the brightness level is set below maximum, then jump to topic, “Display: Backlight Issue / No Backlight.” 2.
3. When display flicker, verify whether one of the following symptoms occurred: • Flickering image • Horizontal bands of static intermittently appear • Dock and / or menu bar shift positions • Display intermittently flashes on / off Yes Remove glass and LCD panel. Check , reseat, and secure the DisplayPort LCD cable to both ends. Check and reseat the VSync cable to both ends. Go to step 4. No LCD panel OK. Go to step 4. 4. Power ON computer and verify if issue still occurs.
8. Verify if high pitch noise varies when adjusting brightness level up and down. 2010-09-09 Yes Noise seems to be generated by vertical sync cable. Inspect and replace cable. Replace the LED Backlight board if problem persists. No Noise is from another source. Go to step 8. 9. Verify if noise can be heard when computer is set up with user seated in normal user position. Adjusting brightness level up and down may be necessary to recreate issue. Yes Replace LED backlight board. Go to step 9.
LCD Image Issues Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check Symptom Quick Check LCD Issues • Incorrect/missing colors • Distorted/blurred image • Pixel anomalies • Vertical/horizontal lines • Non-uniform brightness • Flickering 1. If display flicker only occurs when the brightness level is set below maximum, then jump to topic, “Display: Backlight Issue / No Backlight.” 2.
4. Verify if issue is bright or dark pixel anomalies. Yes Go to pixel anomalies. No Go to step 5. 5. Verify if issue is vertical or horizontal lines. Yes Go to vertical/horizontal lines. No Go to step 6. Yes Go to non-uniform brightness. No LCD functioning OK. Return to appropriate symptom flow if issue is still present. 6. Verify if issue is non-uniform brightness.
Incorrect/Missing Colors Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Incorrect/Missing Colors • Wrong color display • Color/contrast issues 1. Allow display to reach normal operating temperature for about a minute before evaluating front-of-screen performance. 2. Verify if System Preferences > Display settings are configured to use default display profile. 3.
4. Set up computer side-by-side with a known-good, samemodel computer showing same image. Verify if issue is noticeably worse on display being tested. 2010-09-09 Yes Replace LCD panel. Run Apple Service Display Utility to verify the resolution of issue. Enter the resulting verification code into the “Notes” field of GSX and return system to customer if repair is complete No Small variations in color uniformity across display are normal and do not warrant replacement of LCD.
Distorted/Blurred Image Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Distorted/Blurred Image • Text and graphics appear fuzzy • Image corrupted 1. If display flicker only occurs when the brightness level is set below maximum, then jump to topic, “Display: Backlight Issue / No Backlight.” 2. Run Automatic Software Update to verify that all available firmware and software updates have been applied. 3.
3. Verify if issue is visible on an external display attached to mini DisplayPort. Yes Issue NOT caused by internal LCD panel. Go to step 7. No Go to step 4. 4. Inspect glass panel. Verify if issue is caused by condensation or contaminants on inside surface of glass panel. Yes Clean glass and/or LCD using procedures in Glass Panel take-apart chapter. Identify possible sources of contamination (nearby cigarette/cooking smoke, heavy airborne dust, etc.) to prevent recurrence.
Pixel Anomalies Unlikely cause: logic btoard, power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Pixel Anomalies • Dark dot anomalies • Bright dot anomalies • Debris on inside surface of glass panel • Debris on surface of LCD panel 1. Clean outside surface of glass panel. 2. See kBase #HT1721: About LCD display pixel anomalies. Deep Dive Check 1. Determine if “defects” are dust/ debris on surface of glass panel or LCD. 2.
4. Determine if combination of bright/dark pixel defects exceed acceptable number. See kBase #HT1721: About LCD display pixel anomalies. 2010-09-09 Yes Replace LCD panel. Run Apple Service Display Utility to verify the resolution of issue. Enter the resulting verification code into the “Notes” field of GSX and return system to customer if repair is complete No Explain to user that LCD panel is operating within specifications for pixel defects. Do NOT replace LCD panel.
Vertical/Horizontal Lines Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Vertical/Horizontal Lines • Vertical lines • Horizontal lines 1. Boot from install DVD to determine if potential software issue exists. 2. Verify if issue is visible on an external display. Deep Dive Check Action 1.
2010-09-09 6. Verify if issue is still present with replacement logic board installed. Yes Go to step 7 No Issue resolved. 7. Reinstall original logic board and verify if issue is still present with original logic board reinstalled. Yes Replace LCD panel. Run Apple Service Display Utility to verify the resolution of issue. Enter the resulting verification code into the “Notes” field of GSX and return system to customer if repair is complete. No Issue resolved.
Non-Uniform Brightness / Color Unlikely cause: power supply, hard drive, optical drive, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Non-Uniform Brightness/Color • Brightness not uniform • Color not uniform • Yellow tint 1. Verify System Preferences > Displays > Brightness slider is set above minimum. 2. Allow a minute for backlight to reach normal operating temperature and output before evaluating display. 3.
Cosmetic Defects Symptoms Quick Check Cosmetic Defects to LCD • Cracked glass panel • Cracked LCD • Scratched LCD polarizer • Scorched or melted LCD • LCD impact damage • Foreign material on LCD or back side of glass panel. 1. Replace glass panel. Refer to Take Apart/General Information/How to Remove a Broken Glass Panel 2. Determine if damage was caused by user environment, accidental damage, or abuse.
Mass Storage Hard Drive Not Recognized Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Drive Not Recognized Drive No Boot • Flashing Question Mark • Boots to Grey Screen • Boots to Blue Screen • Boots to Prohibitory Symbol (Review kBase #HT2674: Intelbased Mac: Startup sequence and error codes, symbols) 1. Use a known-good mouse. A stuck mouse button will not allow boot. 2. Boot from Install DVD. Use Disk Utility to verify S.M.A.R.T.
2010-09-09 5. Check that the 4 wire SATA power cable (carrying 12v and 5v DC) is correctly connected to the Hard Drive (other SATA power connector has less wires and is reserved for 5v DC only, optional SSD drive). Inspect internal drive(s) SATA and power cables and connectors for bent pins, or other damage to the cable(s). Yes Replace any damaged SATA Bus or SATA Power cable. For the internal SATA drive(s), the DC power comes from the main DC power cable harness. Go to step 8. No Go to step 6. 6.
11. If restore from Install DVD is unsuccessful, startup a knowngood Intel Mac system with T key pressed (to enter Target Disk Mode), insert the iMac Install DVD in its optical drive and connect it to the user’s system via a FireWire cable. Startup user’s system while holding Option key, then select and boot from the Install Disc DVD and restore system software. Verify if software restore was successful. Yes Restore failure seems to be due to customer’s internal optical drive or media issue.
2010-09-09 3. With user’s permission, erase internal drive(s) containing Mac OS X, and reinstall it. Verify if installation process completes. Yes Go to step 6. No Go to step 4. 4. Inspect internal drive(s) SATA power and data cables and connectors for bent pins, or other damage to the cable. Yes Replace damaged cable. Go to step 6. No Go to step 5. 5. Reseat SATA cable on internal drive(s) and logic board. Verify if computer starts up. Yes Go to step 6.
Hard Drive Noisy Unlikely cause: LCD panel, logic board, power supply, speakers, camera, microphone Quick Check Symptoms Quick Check Hard Drive Noisy • Noise during start up • Noise during operation • Noise when drive is copying or saving data 1. Boot from Install DVD. Use Disk Utility to verify S.M.A.R.T. status of hard drive. 2. Use Disk Utility to repair disk. 3. Determine if noise is comparable to another machine of the same model. 4. Refer to Kbase article TS3204: Evaluating normal noise.
6. Remove hard drive and verify if rubber vibration isolation grommets are properly installed in hard drive bracket (attached to hard drive) and to mechanism in rear housing (where hard drive pins insert). Yes Go to step 7 No If grommets are missing or damaged, replace hard drive bracket or mechanism as appropriate. Go to step 7 7. Restart system and verify if the noise is still present. Yes Go to step 8 No Reseating or replacing the drive rubber grommets / bracket solved noise issue. 8.
Optical Drive Not Recognized Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Drive Not Recognized/Mount • Discs inject and eject, but do not appear in Finder • Verify that optical media is not physically damaged 1. Use System Profiler Serial-ATA section to see if optical drive appears. 2. System Profiler Serial-ATA section will show any media inserted. 3.
5. Connect original optical drive to known-good SATA cable. Verify if both CD and DVD media are read reliably. Yes SATA cable issue. Replace SATA cable. Go to step 6. X03 No Replace optical drive. J03 6. Test read compatible knowngood CD and DVD media (Install DVD). Verify if media is recognized and reads reliably. Yes Issue resolved. No Replace optical drive.
4. With known-good optical drive installed, test for media inject/ eject. Verify if drive accepts and ejects known-good media. Yes Known-good optical drive resolved inject/eject issue. Replace optical drive. J03 No Go to step 7. 5. Inspect optical drive slot during disc insert/eject. Verify if discs can be inserted easily. Yes Go to step 6. No Verify correct optical drive bezel alignment with enclosure. Reseat optical drive then retest. If issue persists, replace optical drive. 6.
Deep Dive Check Result Action 1. Verify if media is free to spin without optical drive scraping edge or surface of media. Yes Go to step 3. No Go to step 2 2. Reseat optical drive in enclosure and verify that a media can be inserted without being scratched Yes Go to step 3 No Replace optical drive and retest. 3. Test both CD and DVD media. Verify if drive can read both CD and DVD media. Yes Go to step 7.
Optical Drive Not Performing to Specifications Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Optical Drive Not Performing to Specifications • Read or write speeds slower than expected 1. Test optical media in another computer of the same type to rule out media issue. 2. For write issues, check with known-good media that performs well in another computer and drive of the same type. Deep Dive Check 1. Test both CD and DVD media.
6. Media that is out of balance may not perform well at higher speeds even though higher speeds may be supported by the optical drive. Verify if slowing requested burn speed allows discs to be written reliably. Yes Media issue. No repair necessary. No Go to step 7. 7. Test write data to compatible CD and DVD media. Verify burned media is recognized and reads reliably. Yes Issue resolved.
Optical Drive Noisy Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone Quick Check Symptoms Quick Check Optical Drive Noisy (J04) • Noise during boot • Noise during operation • Noise when drive is copying or writing data 1. Test optical media in another computer of the same type to rule out media issue. 2. Check with known-good discs like the Install DVD that came with the computer. 3. Verify if noise occurs without media in optical drive.
SD Card Will Not Insert Into Slot Unlikely cause: LCD panel, logic board, optical drive, hard drive Quick Check Symptom Quick Check SD Card will not insert into slot • SD Memory Card does not fully seat into slot • Card slot does not align with enclosure. 1. The SD card must be a 32 mm by 24 mm by 2.1 mm. You can also use thinner cards, such as Multi Media Cards (MMC). 2. Clear any obstruction in SD card slot. Deep Dive Check 1. Verify if known-good SD card fits in slot. 2.
SD Card Not Recognized Unlikely cause: LCD panel, logic board, optical drive, hard drive Quick Check Symptom Quick Check SD Card Not Recognized • Card does not show up on desktop or in System Profiler 1. Insert user’s SD card into a known-good system and verify that it functions properly. If card cannot be read, contact card manufacturer for support options. 2. Verify SD card slot with known-good SD card. 3. Check correct drivers are installed for user’s SD card type.
5. Verify if a known-good unlocked SD card can now be correctly read and written. Yes Go to step 6. No Replace SD reader board. 6. Lock the user’s SD card and verify if it can’t be written. Yes Issue resolved. No Replace SD reader board. X24 M17 Uncategorized Symptoms Check 1. Verify if existing symptom code applies to issue reported by user. 2010-09-09 Result Action Yes Jump to appropriate symptom code flow. No Document reported failure and send feedback to smfeedback2@apple.
Communications AirPort/Bluetooth Issues Quick Check Symptoms Quick Check AirPort/Bluetooth Issues • Unable to join networks or pair devices • AirPort card not available • Intermittent device or connection dropouts • Limited wireless range 1. Verify that AirPort or Bluetooth is turned ON, and for AirPort issues make sure that a network is selected. 2. (AirPort) Run the Apple System Profiler and verify that installed AirPort card supports the channel number used by the wireless access point. 3.
Deep Dive Check Result 1. Open System Profiler. AirPort is listed under Network, while Bluetooth is listed under USB. Verify if both AirPort and Bluetooth cards are recognized. 2010-09-09 Action Code Yes Install all available software updates for AirPort/Bluetooth and re-test. If issue persists after software update, go to step 4 for AirPort, or go to step 6 for Bluetooth. No Go to step 2 for AirPort. Go to step 6 for Bluetooth. 2.
2010-09-09 6. (Bluetooth) Verify that computer and known-good Bluetooth device are both in discoverable mode. Verify if you can now successfully and reliably pair the device. Yes Issue resolved. No Replace Bluetooth antenna. Go to step 7. 7. (Bluetooth) Re-test with new Bluetooth antenna and verify if Bluetooth issues are resolved. Yes Issue resolved. No Replace Bluetooth card.
AirPort Card Kernel Panic Quick Check Symptoms Quick Check AirPort Card Kernel Panic • Kernel Panic on startup • Kernel Panic or freezing while attempting to connect to WiFi networks • Kernel Panic while transferring data on WiFi networks 1. Isolate OS by starting up from original Install media for this computer, a same-model computer in Target Disk Mode, or compatible known-good OS on an external drive. AirPort and Bluetooth services are available when booted from the Install disk. 2.
Ethernet Port/Device Issue Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check Symptoms Quick Check Ethernet Port/Device Issue • No Ethernet device present • Unable to access network resources • Ethernet device shows no connection • Ethernet device unable to an IP address • Slow network performance 1. Check Ethernet cable for damage. Try a known good Ethernet cable – CAT5 or better recommended for 100Mbps+ connections. 2.
4. Check for speed and duplex issues on network. Open System Preference > Network; click the Advanced button, then the Ethernet tab. Verify if the speed and duplex reported are what is expected. Yes Go to step 5. No Change speed and duplex settings. See article http:// docs.info.apple.com/article. html?path=Mac/10.6/ en/8711.html. Go to step 6. 5. Check for MTU (Maximum Transmission Unit) issues. See kBase #HT2532: Mac OS X: How to change the MTU for troubleshooting purposes.
Deep Dive Check 2010-09-09 Result Action 1. Without any wired input devices connected, and with a known-good wireless mouse or trackapd in discoverable mode, startup the computer. Verify if computer shows the Bluetooth Mouse Setup Assistant. Yes Bluetooth hardware is active. Go to step 6. No Go to step 2. 2. Connect a wired mouse and run Apple System Profiler. Verify if Bluetooth interface is listed under USB in System Profiler. Yes Bluetooth hardware is present. Go to step 6.
8. With known-good Bluetooth mouse/trackpad paired, verify if the device stays connected. 9. With customer’s mouse/ trackpad paired, verify if the mouse stays connected. Yes Issue resolved. No Inspect and reseat Bluetooth antenna cable. Replace a damaged antenna cable, or Bluetooth board if its antenna connector is damaged. Go to step 9. Yes Antenna issue. Issue resolved. Resassemble system. No Go to Wireless Input Device Loses Connection symptom flow.
Input/Output Devices Apple Remote Inoperable Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check Symptoms Quick Check Apple Remote Inoperable • Apple Remote doesn’t bring up Front Row • Apple Remote doesn’t control iTunes • Apple Remote doesn’t control computer volume 1. Make sure Apple Remote is within 30 ft. of computer, and has an unobstructed line-of-sight to computer. 2. Make sure lens end of Apple Remote is pointing directly at front of computer. 3.
2010-09-09 4. After clicking “Unpair”, verify if the computer now responds to the Apple Remote. Yes Pairing issue. Issue resolved. No Possible IR board issue. Go to step 5. 5. Open Apple System Profiler. Verify if “IR Receiver” is listed in USB list of devices. Yes IR board reporting on USB bus. Check for lens block. Go to step 6. No Inspect and reseat IR cable connection to logic board. Go to step 7. 6.
Audio: Microphone Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check Symptoms Quick Check Audio: Microphone • Microphone not working • Microphone audio garbled • No sound 1. Verify that no tape, sticky notes, or other objects are blocking microphone located on top of computer near camera. Microscopic perforations on top of computer must be free of obstructions in order for microphone to function. 2. Go to System Preferences > Sound > Input.
5. Inspect microphone cable routing and verify if cable is pinched or damaged. 6. Record sound sample using GarageBand or iMovie. Verify if sound quality of sound sample is normal during playback. Yes Replace rear housing (microphone cable not available separately). No Go to step 6. Yes Microphone circuitry OK. Return system to user. No Replace logic board.
3. Connect external speakers or headphones to audio-out port and play a known-good sound file. Verify if sound quality is acceptable. Yes Suspect bad speaker. Go to step 4. No Audio CODEC or amplifier issue suspected. Replace logic board and retest. M09 4. Inspect LEFT and RIGHT speaker cones and speaker connection cable for damage. Verify if speakers have visible damage. Yes Replace damaged speaker. Retest. L11 No Go to step 5. 5.
Deep Dive Check Result Action 1. Verify if boot chime is present when system is powered ON. Make sure audio output preferences are not set to mute and volume is set to mid-range. Yes Go to step 2. No Reset PRAM and retest. 2. Make sure no cables are connected to external sound input/output ports. Go to System Preferences > Sound > Output and verify that “Internal speakers” is an available option. Yes Go to step 3. No If “Headphones” is the only available sound output device, replace audio cable.
2010-09-09 7. Connect external speakers or headphones to audio-out port and play a known-good sound file. Verify if sound quality is acceptable. Yes Logic board, internal speakers, and audio-out port functioning correctly. Return system to user. No Go to step 8. 8. Disconnect and carefully inspect audio connectors assembly and its connection to logic board for damage such as bent pins or pinched/cut wires. Yes Replace damaged audio connectors assembly.
Camera Issues Unlikely cause: LCD display, power supply, hard drive, optical drive, fans, speakers, microphone Quick Check Symptoms Quick Check Camera Issues • Camera not detected • No green LED for camera • Excessive blooming • Poor White Balance • Poor Focus • Green image • Image distortion 1. Launch Apple System Profiler and confirm that system’s USB hub and built-in camera are visible. 2. Verify camera lens and glass panel are clean and free of contaminants. Clean glass panel if needed. 3.
FireWire Device Not Recognized Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check Symptoms Quick Check FireWire Device Not Recognized • FireWire hard drive not recognized • FireWire optical drive not recognized • FireWire camera not recognized • FireWire printer not recognized 1. For external FireWire drives, make sure any external power source is plugged in and operating to isolate a power issue with the device. 2.
2010-09-09 4. Verify if FireWire device is recognized with a knowngood FireWire cable on user’s computer. Yes FireWire cable issue. Issue resolved. No FireWire device may need additional power. Go to step 5. 5. Using a powered FireWire hub, and having installed any software or firmware updates for the device, verify if FireWire device is now recognized. Yes Device recognized. Required additional power from hub or update. Issue resolved.
USB Device Not Recognized Unlikely cause: LCD display, power supply, hard drive, optical drive, fans Quick Check Symptoms Quick Check USB Device Not Recognized • USB wired keyboard/mouse not recognized • USB external drive not recognized • USB camera not recognized • USB printer not recognized 1. Reset SMC. 2. For printers and external USB drives, make sure any external power source is plugged in and operating to isolate a power issue with device. 3. The iMac has 4 USB ports on rear of computer.
3. Verify if a known-good USB keyboard and mouse are recognized. 2010-09-09 Yes Test original USB mouse and keyboard. Replace if still not recognized. Go to step 5. No External USB ports not functioning. Replace logic board. 4. With no USB devices connected, restart computer. Verify if Bluetooth Mouse Setup assistant launches after startup. Yes Bluetooth detected. Go to step 3. No Bluetooth not recognized. Internal and external USB not functioning. Replace logic board. M15 5.
Wired Keyboard Does Not Function Properly Quick Check Symptoms Quick Check Wired Keyboard Does Not Function Properly • Some or all keys on the keyboard don’t work • Eject key or Caps Lock key doesn’t seem to work • Some keys don’t work as expected 1. Reset SMC 2. Open System Preferences > Universal Access > Mouse & Trackpad and verify that Mouse Keys is turned OFF. When enabled, Mouse Keys can disable functionality of some or most keys, depending on keyboard used. 3.
4. Open System Preferences > Speech. Verify if the “Speak selected text when the key is pressed” checkbox is selected. 2010-09-09 Yes The key combination to speak text cannot be used for any other purpose. Either disable, or change to a more rare key combination (including Shift, Command, Option and Control). No Go to step 6. 5. With optical media in the drive, hold the media Eject key. Verify if the eject symbol appears on screen and that optical media is ejected if present.
Keyboard: Specific Keys Do Not Respond Quick Check Symptoms Quick Check Keyboard: Specific Keys Do Not Respond • One or more keys do not respond when pressed • Key sticks • Keycap missing 1. If wireless keyboard is being used verify that it is properly paired with computer. Go to Wireless Input Device Doesn’t Pair symptom flow to resolve pairing issues. 2. The caps lock key has a built-in delay to reduce accidental activation and must be held for approximately ½ second for it to be activated.
Deep Dive Check Result 1. Verify if computer recognizes keyboard or mouse when plugged into rear USB ports on back of iMac. Yes Action Test device in all USB ports to ensure all other USB ports are working as expected. Replace logic board if any USB port on rear fails. Replace keyboard if any USB port on keyboard fails. Code M15 K11 Go to step 2. 2010-09-09 No Go to USB Device Not Recognized symptom flow. 2. Verify if keyboard is working as expected. Yes Go to step 3.
Wireless Input Device Does Not Pair Quick Check Symptoms Quick Check Wireless Input Device Does Not Pair with computer • Apple Wireless Keyboard/Magic Mouse/Magic Trackpad not recognized when powered on. • Unable to pair Bluetooth input device with computer. • Bluetooth Magic Mouse buttons not working. • Apple Magic Trackpad clicking/ tracking/tapping actions not working properly 1. Remove/ reinstall batteries into device to check they were not reversely inserted. 2.
Deep Dive Check Result 1. (Apple Wireless Keyboard, Magic Mouse, Magic Trackpad) With known-good charged batteries and known-good up to date Mac OS X computer with the Bluetooth device software installed, run the Bluetooth Service Diagnostic utility (available in the Disk Images page of GSX/Service Source) and verify that all tests pass. Yes Go to step 2.
5. Reinstall customer’s batteries in device and try to pair Bluetooth device using the Bluetooth Setup Assistant. Verify that device can be recognized and used. 2010-09-09 Yes Issue solved. No Recommend that customer replace batteries. If device had fully charged Apple Rechargeable Batteries, go to Apple Battery Charger does not charge batteries.
Apple Wireless Mouse/Magic Trackpad Erratic Tracking Quick Check Symptoms Quick Check Apple Wireless Mouse/Magic Trackpad erratic tracking. • Cursor tracking is jumpy. • Tracking /Clicking/Tapping actions not working • Unresponsive tracking and wrong gesture triggers 1. Verify all software and firmware updates have been installed. 2. Verify the Bluetooth device software has been installed. 3.
Wireless Input Device Loses Connection Quick Check Symptoms Quick Check Wireless Input Device Loses Connection • Apple Wireless keyboard, Magic Mouse, Magic Trackpad or other Bluetooth input device loses connection 1. Check orientation of wireless device to computer. Test Magic Trackpad or Magic Mouse with it positioned on either side of computer. 2.
2010-09-09 2. Make sure device is on. In System Preferences > Bluetooth, select device and from the Action menu (gear) choose “Connect”. Verify if device connects successfully. Yes Go to step 7. No Delete pairing in System Preferences. Go to step 3. 3. With the device on, run Bluetooth Setup Assistant. Verify if you can successfully pair the device. Yes Go to step 7. No Restart computer. Go to step 4. 4. With device on, run Bluetooth Setup Assistant. Verify if you can successfully pair device.
Apple Battery Charger Does Not Charge Batteries Quick Check Symptoms Quick Check Apple Battery Charger Does Not Charge Batteries • No Amber/Green status LED visible on charger when batteries are installed and charger is connected to AC. • Amber status LED is flashing • When installed in the input device, the batteries don’t power it. • Batteries only provide limited run time when used. • Batteries show leak/inflation signs 1.
3. Verify if the charger LED will go green when a known-good set of partly charged NiMH AA batteries was installed and had been left for some hours (up to 5 hours if a fully discharged set was installed in charger). Note: Status LED may turn OFF after charge has been completed more than an hour. Yes When charge of the knowngood batteries set has ended (status LED turned to green), insert them in a known-good input device and go to step 4.
Mechanical Noise/Hum/Vibration Unlikely cause: LCD panel, glass panel, enclosure, cables Quick Check Symptoms Quick Check Noise/Hum/Vibration • Buzzing noise • Rattling noise • Ticking noise • Squeaking noise 1. Verify that the vents on the bottom and back of the system are free of dust and other obstructions that might inhibit proper airflow through the system. 2. Launch Applications/Utilities/Activity Monitor. Determine whether an application or process is consuming a high percentage of CPU bandwidth.
Deep Dive Check 1. Verify if any tape, gasket, cable label, or cable is touching the fan blades and causing a ticking noise. Action Yes Secure the material so it doesn’t touch fan blades. If tape adhesive has lost its stickiness, replace that section of tape. No Go to step 2. Yes Locate affected part and check for correct cable seating. Use ASD Error Codes table and sensors location table (in General Troubleshooting) to decode error. Follow instructions in table for resolving error, then retest.
2010-09-09 7. Remove fans and rotate blades. Verify if fan blades spin smoothly without interference from fan housing. Yes Go to step 8 No Replace affected fan. P04 8. Reinstall fans while carefully ensuring that there are no cables routed under or near fan assembly that might cause interference with fan blades. After reassembling system verify if noise issue is resolved. Yes Noise issue resolved.
Fan Failures / Thermal Issues Unlikely cause: speakers Quick Check Symptoms Quick Check Fan Failures / Thermal Issues • System feels very hot • Fan(s) not operating • Fan(s) running fast • System is noisy 1. Verify that vents on bottom and back of system are free of dust and other obstructions that might inhibit proper airflow through the system. 2. Verify that computer is not exposed to direct sunlight which may heat up enclosure, making it feel hot to the touch. 3.
2. Verify if noise sounds like one or more fans running faster than expected. Yes Fans running fast. Reset SMC by disconnecting power cord for ~15 seconds then retest. If issue continues go to step 3. No Go to step 3. Yes Secure the material so it doesn’t touch fan blades. If tape adhesive has lost its stickiness, replace that section of tape No Go to step 4. 4. Remove fans and rotate blades. Check for any dust that could be clogging the fans.
Physical Damage Symptoms Quick Check Physical Damage • Broken glass • Bent stand • Broken hinge • Stripped screw/head • Stripped screw boss • Dent or scratch to chassis 1. Verify if damage caused by user environment, accidental damage, or abuse. If applicable inform the user that Apple does not warrant damage caused by accident, abuse, misuse, flood, fire, earthquake, or other external causes. For more information refer to: http://www.apple.com/legal/warranty Uncategorized Symptoms Check 1.
Service Source Take Apart iMac (27-inch, Mid 2010) © 2010 Apple Inc. All rights reserved.
General Information Opening the Unit • • • The iMac (27-inch, Mid 2010) has a glass panel that attaches to the front, which must be removed prior to replacing any module on the unit. Important: The glass panel should only be removed by Apple-authorized technicians. Read and follow all of the cleaning and handling recommendations to prevent damaging the glass and LCD panel. Follow ESD precautions when the front bezel and the LCD display are removed.
Required Special Tools for Glass Panel Special tools are required to remove, handle and clean glass panel. • 922-8252 – Suction cups, Pkg of 2 • 922-8253 – Gloves, lint-free, anti-static, Pkg of 2 • 922-8258 – ESD bags, 24”x20”, Pkg of 5. To prevent buildup of static charges which may attract dust particles, store LCD panel in an ESD bag when it is removed from unit.
Cleaning & Handling the Glass Panel Follow the cleaning procedures in this manual to ensure the glass panel is free of dust and other particles before returning the computer to the customer. • The glass panel is not tempered and will break into sharp pieces of mishandled. A scratched or broken glass panel is not covered under warranty. • Removing the glass panel requires special tools such as lint-free gloves, rubber suction cups, and microfoam storage bags.
Handling a Broken Glass Panel The glass panel is not tempered and will break into sharp pieces if mishandled. If the glass is broken it must be carefully removed from the unit to prevent irreparable damage to the front surface of the LCD. If the front surface of the LCD is scratched by broken glass, the LCD may need to be replaced. How to Remove a Broken Glass Panel A shattered panel can be removed using safety glasses, packing tape, and leather gloves. 1. Put on safety glasses and leather gloves. 2.
3. Peel protective covering off the front of the glass. Remove and discard any large pieces of broken glass. 4. Apply a strip of packing tape horizontally across the top and bottom of the glass panel. Next, apply the tape diagonally, across the broken glass panel, forming an “X.
5. Continue applying tape horizontally, thoroughly covering the broken glass. Most of the glass will still be attached to the steel ring that runs around the perimeter of the glass panel. 6. Use a black stick to pry the glass panel off the magnets on the rear housing.
7. Lift the entire glass panel off the housing. 8. Place the broken glass inside a large box, label the box, and dispose of it properly.
9. Using a whisk broom, clean the work surface of tiny glass particles. 10. Stand the iMac up and use a lint free cloth to carefully brush any of the particles off of the iMac onto the table. Clean the work surface again. 11. When the repair is finished the cloth should be disposed of immediately. 12. Use a broom and dustpan to sweep up as much of the broken glass as possible. Glass fragments may have traveled several feet from the location of the glass panel, so be sure to thoroughly clean the entire area.
Safety Warning: HIGH VOLTAGE: The AC/DC power supply PCB remains powered up whenever the system is plugged in, whether or not the system has been turned on. Use extreme caution when troubleshooting the system with the front bezel removed. • Don’t work alone. In the event of an electrical shock it is important to have another individual present who can provide assistance. • Keep one hand in your pocket when working on any iMac system that is plugged in.
Logic Board Handling IMPORTANT: Always use two hands to support the logic board, video card and heatsinks. Handling the board incorrectly could flex the board and damage the chips and circuitry. Never handle the board by the heatsink or video card. Reassembly Steps When there are no replacement steps listed, replace parts in the exact reverse order of the Removal procedure.
Access Door First Steps • • Shut down the computer Place the computer on a clean, flat surface Tools • • ESD mat and wrist strap Phillips #2 screwdriver 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Access Door 135
Removal 1 Raise the stand and loosen 3 captive screws. 2 Remove the access door. Important: To ensure proper cooling, the iMac should not be operated without access door installed.
Memory First Steps Remove • Access door Note: This computer uses PC3-10600, (1333) DDR3, 204-pin, SO-DIMMs.
Removal 1 Untuck tabs in the memory compartment. 2 Pull tab to eject the installed memory module. Reassembly 1 Orient notch on memory with notch in the memory compartment. 2 Press memory firmly into slot until you hear a click. 3 Tuck black plastic tabs into memory compartment. 4 Replace access door and tighten 3 screws. Important: To ensure proper cooling, the iMac should not be operated without access door installed.
Glass Panel First Steps • • • Shut down unit. Unplug all cables. Put on ESD strap. Caution: The glass panel is not tempered and will break into sharp pieces if mishandled. A scratched or broken glass panel is not covered by warranty. Important: This procedure requires special tools, which are offered individually or as part of a cleaning kit. See General Take Apart section for more information.
Removal Note: Glass panel is held in place by magnets. Caution: Unlike previous model iMacs, the glass panel has tabs along bottom that align with rear housing. Be careful not to damage tabs when removing glass panel. Apple strongly recommends wearing clean, lint-free gloves whenever handling the glass panel, to reduce cleaning required on reassembly. 1 • • • 2 The glass panel can be removed in various ways: Lay computer on its back and press clean suction cups in opposite corners on glass panel, or...
3 Remove suction cups and slide glass into protective microfoam bag. Reassembly 1 Remove protective covering from silicone roller and sticky sheet. 2 Clean silicone roller by rolling it back and forth a few times on sticky sheet. If sticky sheet looks dirty, use a new one. If roller is no longer tacky, wash it in warm soapy water. If tackiness does not return, replace silicone roller.
3 Set unit in upright position to minimize settling of dust. 4 Roll silicone roller over LCD panel to remove any particles. 5 Remove glass panel from microfoam bag. 6 Clean INSIDE of glass panel with the silicone roller to remove dust. Note: If fingerprints or oils are on inside of glass, clean first with isopropyl alcohol.
7 Wearing clean gloves, place glass directly onto unit, aligning tabs along the bottom with notches in rear housing. Magnets will catch it and hold it in place. Make sure the glass is flush with the rear housing after it is reinstalled. 8 Clean outside of glass panel with a clean, damp microfiber cloth. Wipe glass until there is no longer any residue or haze. 9 Inspect glass for any remaining dust, fingerprints, or a hazy residue.
Camera First Steps Remove • Glass panel Tools • • • Magnetized Torx T10 screwdriver Black stick ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Camera 144
Removal 1 • Remove 2 T10 screws: 922-9239 2 Lift camera bracket out of rear housing. 3 Disconnect camera cable from camera board.
Reassembly 1 Thermal paste is required between the camera and rear housing. Reuse the thermal paste. 2 Use a black stick to remove and reapply paste to camera (areas circled in graphic). Note: A syringe of thermal paste is available as needed, part number 9229625, good for 5 applications. Important: The white thermal paste used on camera should NOT be used for any other purpose (such as portable computer heatsinks).
LCD Panel First Steps Remove • Glass panel Caution: Do not press on front surface of LCD panel when handling.
Removal 1 Remove 8 T10 screws: 922-9246 Reassembly Note: Do not overtighten LCD screws, which could cause light leakage after unit is reassembled. 2 With computer standing up and facing you, pull the LCD forward slightly from the top edge to access 4 cables inside. CAUTION: Tilt display out no more than 4 inches (10 cm). Pulling display too far could damage panel cables or connectors.
3 Looking down into the computer, on the left side, disconnect the vertical sync cable from the top of the backlight board. Pull straight up. WARNING: HIGH VOLTAGE Use extreme caution when working around the power supply, which contains a highvoltage capacitor that may remain charged for several minutes even when the computer is unplugged.
4 • • 5 Pull display forward slightly to disconnect: #1: backlight power cable at bottom of backlight board. Pinch and pull cable down from connector #2: display temp sensor cable next to the AirPort cable. Pull straight up To the right of the display temp sensor, carefully peel DisplayPort cable (attached with double-sided tape) away from the video card bracket.
6 • 7 • • • • Gently remove the DisplayPort cable. Squeeze side metal tabs (#1) to release and pull cable (#2) up from connector. Lift the LCD panel off rear housing.
8 Without touching the panel surface, carefully store the LCD panel in an antistatic bag.
Handling the Panel 1 Important: Handle LCD panel by the edges only. Use two hands to carry the panel. 2 Never touch LCD surface or hold LCD panel with one hand. It could damage the panel.
Reassembly 1 The panel is heavy! Lift panel and rest it on the “chin” of the rear housing. 2 Lean panel toward the rear housing. 3 Connect the DisplayPort cable. • Squeeze side metal tabs (#1) to insert cable into connector (#2). Push cable firmly into connector. Verify cable is connected.
4 • • 5 In the following order, connect: #1: display temp sensor #2: backlight power I Press sticky DisplayPort cable onto the video card bracket.
6 Connect the vertical sync cable to the backlight board. 7 Replace 8 panel screws.
Vertical Sync Cable (Vsync) First Steps Remove • Glass panel • LCD panel Tools • Black stick Removal 1 With a black stick, peel back mylar tape to expose cable. 2 Pull cable straight out of connector. Replacement Note: Insert Vysnc securely into panel connector, replace mylar tape.
LED Temp Sensor Cable First Steps Remove • Glass panel • LCD panel Tools • Black stick Removal 1 Peel black insulator to access cable. 2 Disconnect sensor from bracket. Replacement Note: Insert sensor securely into bracket. Replace foam over sensor to isolate the sensor from the internal air temperature.
DisplayPort Cable First Steps Remove • Glass panel • LCD panel Tools No tools are required for this procedure. Removal 1 Peel back mylar tape securing cable to LCD panel.
2 Peel back aluminum tape securing DisplayPort cable to panel connector. Replacement Note: A replacement DisplayPort cable will come with: • a piece of black mylar tape • a piece of aluminum tape 3 Press in on metal side release clips and then gently pull down to disconnect DisplayPort cable.
Audio Ports and Cable First Steps Remove • Glass panel • LCD panel Tools • • Torx T10 screwdriver ESD mat and wrist strap 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Audio Ports and Cable 161
Removal 1 • 2 Disconnect audio cable from logic board and remove 2 T10 screws. 922-9245 Remove cable from rear housing. Reassembly Note: • • A black stick can be helpful for guiding and aligning audio ports with rear housing. Plugging in the earbuds or headphones can also help keep audio cable aligned while tightening screws.
AirPort Antenna First Steps Remove • Glass panel • LCD panel Tools • • Magnetized Torx T8 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — AirPort Antenna 163
Removal 1 Disconnect antenna cable from AirPort card. WARNING: Be careful not to damage AirPort antenna connectors as it may induce antenna or rear housing replacement (lower antenna, near Apple logo, is part of rear housing). 2 Peel up EMI tape securing antenna cable to rear housing. 3 Remove 2 T8 antenna screws: 922-4723 • 4 Remove antenna from housing.
AirPort Card First Steps Remove • Glass panel • LCD panel Tools • • Magnetized Torx T6 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — AirPort Card 165
Removal 1 • 2 Remove 1 T6 screw. 922-8579 Disconnect 2 AirPort antenna cables. Important: Antenna cables and connectors are delicate. If the shorter of the two antenna cables is damaged, you will need to replace the rear housing. 3 Hold card by edges and pull it out of the slot.
AirPort Carrier Board First Steps Remove • Glass panel • LCD panel • AirPort card Tools • • Magnetized Torx T10 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — AirPort Carrier Board 167
Removal 1 Remove Kapton tape securing AirPort data cable to carrier board. 2 Disconnect Airport data cable. 3 Remove 2 T10 screws: 922-6850 • 4 Lift AirPort carrier board from rear housing. Replacement Note: Secure both ends of the AirPort cable with Kapton tape.
AirPort Cable First Steps Remove • Glass panel • LCD panel • AirPort carrier board Tools • ESD-wrist strap and matt • black stick 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — AirPort Cable 169
Removal 1 With a black stick, remove Kapton tape (wrapped around carrier board) securing the AirPort cable to the carrier board. 2 Lift AirPort cable off carrier board. 3 Remove Kapton tape securing AirPort cable to logic board. Lift cable straight up from board. Replacement Note: Secure both ends of the AirPort cable with Kapton tape.
Bluetooth Antenna First Steps Remove • Glass panel • LCD panel Tools • • Magnetized Torx T8 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Bluetooth Antenna 171
Removal 1 • Remove 2 T8 screws on antenna board: 922-4723 2 Disconnect Bluetooth antenna from the Bluetooth card. 3 Remove antenna from housing.
Bluetooth Board First Steps Remove • Glass panel • LCD panel Tools • • Magnetized Torx T8 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Bluetooth Board 173
Removal 1 • • 2 • Disconnect 2 cables: Bluetooth antenna Bluetooth data cable Remove 1 T8 screw: 922-9247 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Bluetooth Board 174
LED Backlight Board First Steps Remove • Glass panel • LCD panel Warning: HIGH VOLTAGE Use extreme caution when working around the capacitors in the top right corner of the backlight board, which contain high-voltage that may remain charged for several minutes even when computer is unplugged. Never touch the leads on the top side of the backlight board.
Removal Warning: HIGH VOLTAGE If the computer is shut down by removing the power cord, allow the backlight board a good 2-3 minutes to discharge the capacitors before handling it. However, if you select “Shut Down” via the Apple menu, the computer will discharge the capacitors almost immediately. 1 • 2 Remove 4 T10 screws. 922-6850 Lift up board, flip over, and disconnect power connector.
Power Supply First Steps Remove • Glass panel • LCD panel WARNING: HIGH VOLTAGE Use extreme caution when working around the power supply, which contains a high-voltage capacitor that may remain charged for several minutes even when the computer is unplugged. Never touch the leads on the top side of the power supply, especially those near the warning sign.
Removal WARNING: HIGH VOLTAGE If the computer is shut down by removing the power cord, allow the power supply a good 2-3 minutes to discharge the capacitors before handling it. However, if you select “Shut Down” via the Apple menu, the computer will discharge the power supply capacitor almost immediately. 1 • • Remove 4 T10 screws.
2 • • Disconnect 2 cables: DC power (top cable) AC power inlet (taped to pressure wall) Reassembly 1 Route AC power inlet cable over power supply pressure wall. 2 Connect AC power cable and tuck edge of connector under logic board. 3 Press cable into notches on pressure wall. 4 Replace tape over AC power cable and pressure wall. 5 Replace 4 screws.
Backlight Pressure Wall First Steps Remove • Glass panel • LCD panel • Power supply Tools • ESD mat and wrist strap 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Backlight Pressure Wall 180
Removal 1 Lift pressure wall off posts in the rear housing.
Power Supply/Hard drive Pressure Wall First Steps Remove • Glass panel • LCD panel • Power supply Tools • ESD mat and wrist strap 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Power Supply/Hard drive Pressure Wall 182
Removal Lift pressure wall off posts in the rear housing. Reassembly 1 Note: Make sure the camera and AC inlet cables are routed correctly around the pressure wall. 2 The camera cable runs along the right side of the pressure wall, next to hard drive, and through bottom notch in pressure wall.
3 Connect AC inlet cable and then press cable into notches on top of the pressure wall. 4 Replace Kapton tape securing AC inlet cable to pressure wall.
Hard Drive First Steps Remove • Glass panel • LCD panel Tools • • Magnetized Torx T10 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Hard Drive 185
Removal 1 • 2 • • Remove 2 T10 screws from mounting bracket: 922-6850 Disconnect 2 cables: HD power cable HD data cable 3 Leave small HD temp sensor cable attached to drive. 4 Slide hard drive up slightly to lift pins out of 2 rubber grommets on mounting bracket. 5 Disconnect HD sensor cable from top of logic board. 6 Important: Do not disconnect HD sensor cable from hard drive. Each drive manufacturer has a different type of sensor cable, which is provided with a replacement drive.
Reassembly 1 • • If installing a replacement hard drive, transfer the following: hard drive bracket 2 T10 bracket screws 922-9136 • 2 T10 screw pins 922-7001 2 Note: Each hard drive vendor has a unique sensor cable. Do not mix and match temp sensor cables.
Hard Drive Sensor Cable First Steps Remove • Glass panel • LCD panel • Hard drive Note: Each hard drive manufacturer has a different type of sensor cable, which is included with a replacement drive. If replacing sensor cable only, be sure to order correct cable for drive manufacturer.
Removal 1 Disconnect hard drive sensor cable from hard drive and logic board. Note: Do not reuse temp sensor cable. A new sensor cable is included with each replacement drive. Each hard drive manufacturer has a unique sensor cable.
Optical Drive First Steps Remove • Glass panel • LCD panel Important: When servicing the optical drive, handle it by the edges only. Pressing elsewhere on the drive could damage the internal mechanism.
Removal 1 • Remove 4 T10 screws. 922-6850 2 Lift optical drive slightly and wiggle optical drive cable off optical drive. A black stick may be helpful. 3 Pull optical away from slot opening in housing. Note: A replacement optical drive includes the bezel. Do not remove or transfer the bezel.
4 Disconnect optical sensor cable from connector on logic board.
Reassembly 1 If installing a replacement optical drive, a temp sensor/ cable is included with each replacement optical drive. 2 Install optical drive by aligning pins on bezel with holes on optical drive. Check the felt on the optical drive opening. Damaged or wrinkled felt across the opening could impair installation.
3 Replace screws in order shown. Note: Insert a disc into the optical drive to check that optical drive is correctly aligned with the rear housing.
Optical Sensor Cable First Steps Remove • Glass panel • LCD panel • Optical drive Important: When servicing the optical drive, handle it by the edges only. Pressing elsewhere on the drive could damage the internal mechanism.
Removal 1 Disconnect optical sensor cable from logic board. 2 Peel up foam gasket to release sensor end of cable. Replacement Note: A replacement optical drive will include a new sensor cable.
Optical Drive Fan First Steps Remove • Glass panel • LCD panel • Optical drive Tools • Torx T10 screwdriver • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Optical Drive Fan 197
Removal 1 • Remove 1 T10 screw. 922-9236 2 Disconnect fan cable from logic board. 3 Lift fan off 2 guide posts in rear housing.
SD Card Reader First Steps Remove • Glass panel • LCD panel Important: The SD card reader must be replaced like-for-like, with an SD card reader with the same EEE code.
Removal 1 • 2 Remove 1 T8 screw: 922-9241 Disconnect cable and with a black stick, pry SD card reader up and out of rear housing.
Reassembly The SD card reader must be replaced like-for-like, with an SD card reader that has the same EEE code. 1 Look at the sticker on the underside of old SD card reader. 2 The EEE code will read DDHF or 6DW. 3 Compare old SD card reader to both parts in the kit and use the new SD card reader with the matching EEE code.
SD Card Reader Cable First Steps Remove • Glass panel • LCD panel • Optical drive • Optical drive fan Note: The SD card and SD cable are also part of the rear housing assembly.
1 Peel back aluminum tape that covers the exposed portion of the SD cable. 2 Disconnect cable from SD card reader and logic board.
IR Board and Cable First Steps Remove • Glass panel • LCD panel Note: A new IR board includes a new cable. The cable is not available as a separate part.
Removal 1 Remove Kapton tape to access IR cable connector. 2 Disconnect IR cable from logic board. Pull cable straight up to release. 3 With 2 fingers, wiggle IR mounting bracket up and off mounting post. Replacement Note: With your finger, pull front housing out slightly to make room for IR mounting bracket to slide onto IR mounting post.
Logic Board First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory Note: The SSD-only CTO option will have an HDD temp sensor jumper (9229628) in the HDD temp sensor connector location on the logic board. It shorts out the HDD temp sensor when there’s no HDD in the computer. Transfer this jumper if replacing the logic board.
Removal 1 Carefully disconnect 14 cables from the logic board. (1) power button (2) CPU fan (3) skin temp sensor (4) hard drive temp sensor or HD jumper if SSD-only config (5) hard drive fan (6) camera (7) Bluetooth (8) ambient temp sensor (9) AirPort (10) microphone (11) secure digital (SD) (12) audio ports (13) left speaker (14) right speaker 2 Tape cables back so they do not get trapped during reassembly.
3 Remove 8 T10 screws, (in graphic: S=short, M=medium, L=long) • 922-6800, (2) short • 922-9237, (2) 20mm, medium • 922-9243, (4) 24mm, long 4 Gently pull board forward and disconnect 2 or 3 cables (depending on the configuration) on the back side of logic board. DC power cable (#1) SSD data cable (#2) HD data cable (#3) • • • Note: On the SSD-only config, (no hard drive) the HD data cable (#3) is absent and a jumper will be present at the hard drive temp sensor connector location.
5 Carefully lift board up and out of rear housing. Handling the Logic Board Important: Always use 2 hands to support board and heatsink. Handling board incorrectly could flex board and damage chips and circuits. Never handle board by heatsink or metal frame.
Reassembly 1 Remove HD temp sensor jumper if present (applies to SSD-only configs). Important: If jumper is not transferred to replacement logic board on SSD-only configs, the fans will run at full speed. 2 Verify that tamper indicator labels on front and back of heatsink assembly are intact. If labels have been removed or tampered with, logic board is not eligible for exchange.
3 • • • Transfer: memory (install after logic board is in place) video card optical, HDD, & SSD data cables 4 Apply new Ethernet ID label (included in box with new logic board) to bottom of stand. 5 Use the Blank Board Serializer tool to set computer’s serial number on new logic board. 6 Note: You can install the logic board with the computer positioned as shown or with the computer standing upright.
7 • • • Lower board into rear housing. Connect 2-3 cables on the back side, depending on the drive configuration: DC power cable (#1) SSD data cable (#2) HD data cable (#3 Important! Make sure the DC Power cable is securely inserted into connector.
8 Check that the video card cable is connected to the back side of the board 9 Observe how the optical data cable routes over top of DC power cable and extends out to the side. Keep the optical cable out of the way as the board is lowered into place.
10 As you the lower board, position cables into lowest notch on pressure wall. Note: Line up board with edge of CPU fan and screw standoffs. 11 Connect 14 cables to the logic board.
12 Insert cable connectors into the I/O ports to align the board to the ports before replacing the screws.
Video Card First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Tools • Torx T8 screwdriver • Torx T10 screwdriver • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Video Card 216
Removal 1 • Remove 3 screws attaching video card to bracket. (1) 922-7971, T10 • (2) 922-4723, T8 2 Disconnect video card temp sensor from logic board. 3 Support video card as you slide card and heatsink out of slot on logic board. Replacement Note: If you replace the logic board, transfer video card and video card bracket to replacement logic board. Refer to the next page if removing video card bracket from logic board.
1 • 2 To remove the bracket, remove 3 T8 screws on front side of logic board. 922-4723 Carefully slide video bracket off logic board. Be careful not to bump DisplayPort connector as you slide the bracket off.
Solid State Drive (SSD) First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Note: The SSD-only option will have an HDD temp sensor jumper (922-9628) in the HDD temp sensor connector location on the logic board. It shorts out the HDD temp sensor when there’s no HDD in the system. Transfer this jumper if replacing the logic board.
Removal 1 • • Note: There are two SSD drive configs: HDD + SSD or, SSD-only This graphic shows the HDD + SSD configuration. 2 • • • 3 • Disconnect 3 cables from the cable bundle: HDD data & power cables (A) SSD data cable (B) SSD power cable (C) Remove 1 T8 screw in bottom left corner of the pressure wall.
4 Use a black stick to pry pressure wall off rear housing. Dotted lines represent adhesive on under side of pressure wall. Exert some force to release adhesive. 5 Lift pressure wall and SSD drive from rear housing. 6 Turn pressure wall over. Remove 4 screws securing SSD drive to pressure wall.
Reassembly 1 Make sure the Bluetooth cable routes over the top of the SSD drive and pressure wall. 2 On SSD-only configs (no Hard drive), make sure HDD temp sensor jumper is connected to HD temp sensor connector on logic board. If jumper is absent, the fans will run at full speed.
SSD Data Cable First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Tools • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — SSD Data Cable 223
Removal 1 Disconnect SSD data cable from top of SSD drive. Replacement Note: The SSD cable connects to the middle connector of three connectors at the top of the SSD drive. The connector on the left (closest to the hard drive) is unused.
Optical/MXM Pressure Wall First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Tools • Torx T10 screwdriver • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Optical/MXM Pressure Wall 225
Removal Note: Observe the Bluetooth and microphone cable routing before removing the pressure wall. The Bluetooth cable routes over the pressure wall and the microphone cable routes under (illustration shows a non-SSD config). On SSD configs the Bluetooth cable routes over the top of the SSD drive. 1 • Remove 1 T8 screw on pressure wall. 922-9241 2 (Illustration shows SSD drive config) Use a black stick to pry pressure wall off rear housing. Dotted line represents location of adhesive.
Hard Drive Data Cable First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Note: One end of hard drive data cable attaches to back side of logic board.
Removal 1 Disconnect hard drive data cable from side of hard drive. 2 Disconnect other end from back side of logic board.
Replacement Note: As you lower logic board, route DC power cable and hard drive cable into notch on pressure wall.
Optical Drive Data Cable First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Note: Optical drive data cable attaches to back side of logic board.
Removal Disconnect optical data cable from back side of logic board. Replacement Note: Hold the optical cable with your thumb as you lower the logic board into rear housing.
Battery First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Note: Battery is located on the back side of logic board.
Removal 1 Use a black stick to pry battery from battery socket on back side of logic board. Reassembly 1 Make sure battery socket is open and free of dust. 2 Press battery (9229626) into socket with engraved markings (+ side) facing up.
Right Speaker First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • Audio ports • IR board • Memory • Logic board Tools • Torx T10 screwdriver • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Right Speaker 234
Removal 1 • 2 Remove 1 T10 screw. 922-9242 Rotate speaker to the left and lift out of rear housing.
CPU Fan First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Tools • Torx T10 screwdriver • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — CPU Fan 236
Removal 1 • Remove 2 T10 shoulder screws. 922-9236 2 Lift fan up and out of rear housing. 3 Note guidepot on fan that will fit into bottom of rear housing on reassembly. 4 Note routing of ambient temp sensor cable and left speaker cable through clips on fan. 5 Remove ambient temp sensor and left speaker cable from fan. Replacement Note: Transfer ambient temp sensor to replacement fan.
Reassembly 1 Route sensor cable through clip on fan. 2 Route ambient sensor cable under fan and along with fan cable, route through clip on the side of fan.
Ambient Temp Sensor First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board • CPU fan Tools • • Black stick ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Ambient Temp Sensor 239
Removal 1 Note routing of temp sensor cable through clips on fan. 2 Release sensor cable from 2 cable clips on CPU fan. Replacement Note: If you are replacing CPU fan, transfer sensor cable to replacement CPU fan. Reassembly Route ambient sensor cable under fan and along with fan cable, route them through clip on the side of fan.
Left Speaker First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board • CPU fan Tools • • Magnetized Torx T10 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Left Speaker 241
Removal 1 • 2 Remove 1 T10 screw. 922-8249 Lift speaker out of rear shousing. Reassembly 1 Route speaker cable around bottom of CPU fan and through clip on side of CPU fan.
2 Route speaker cable above AC power inlet and toward right speaker. Tuck speaker cable under cable clips in rear housing.
Hard Drive Fan First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Tools • • Magnetized Torx T10 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Hard Drive Fan 244
Removal 1 • 2 Remove 1 T10 screw. 922-9236 Pull the fan straight up and off the guide posts.
Mechanism Cover First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board • Hard drive fan • Optical pressure wall Tools • • ESD-wrist strap and mat Magnetized Torx T10 screwdriver 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Mechanism Cover 246
Removal 1 Peel up aluminum tape. 2 Remove 4 T10 screws; two at the top (bigger screws) and two smaller screws at the bottom. • (2) 922-6800 • (2) 922-9238 (same screws as mechanism) 3 Pry cover off mechanism.
Stand First Steps No preliminary steps are required to remove the stand.
Removal 1 Place the computer face down on a table so that the base of the stand extends over the table edge. 2 Press the stand down and insert an access card into the slot between the top of the stand and the rear housing. 3 Insert the card as far as it will go, and press the stand down until you hear a click—the audible cue that tells you that the stand is locked into place. 4 Remove the access card.
5 • 6 Remove 8 T10 screws. 922-8174 Separate the stand from the clutch mechanism. Reassembly 1 Align the pin on the clutch mechanism to the central hole in the stand. 2 Replace 8 T10 screws. 3 Place the computer face down on a table so that the base of the stand extends over the table edge. Press the stand down and insert an access card into the slot between the top of the stand and the rear housing.
4 Insert the access card as far as it will go. Gently lift the stand approximately two inches to unlock the clutch mechanism, and then remove the access card. The clutch mechanism should now be unlocked. 5 Stand the computer upright.
Mechanism First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board • Hard drive fan • Optical pressure wall • Mechanism cover • Stand Tools • • Magnetized Torx T10 screwdriver ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Mechanism 252
Removal 1 • 2 Remove 6 T10 screws: 922-9238 Lift mechanism off rear housing.
Bluetooth Cable First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • Logic board Tools • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Bluetooth Cable 254
Removal 1 Disconnect the black Bluetooth cable from Bluetooth board 2 Follow cable along to the right....to the right of the mechanism.
3 Peel back EMI tape securing Bluetooth cable to rear housing Lift cable from rear housing. Replacement Note: The cable routes over the notch of the optical pressure wall and connects to the top of the logic board Note: In the SSD drive configuarations, the Bluetooth cable routes over the top of the SSD drive.
Camera Cable First Steps Remove • Glass panel • LCD panel • Camera • Hard drive • Power supply • Power supply pressure wall Tools • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Camera Cable 257
Removal 1 Disconnect camera cable from camera board at top of rear housing. 2 Disconnect camera cable (#5) from the top of logic board.
3 Remove EMI tape at top of camera cable. Lift pressure wall to remove camera cable from rear housing. Replacement Note: The camera cable runs along the right side of the pressure wall, next to the hard drive and through the lower notch in the pressure wall.
Cable, AC/DC Power/Backlight/ SATA First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • AirPort Carrier • Logic board Tools • ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Cable, AC/DC Power/Backlight/SATA 260
Removal 1 Observe cable routing for reassembly. 2 Release cable from cable clips and lift out of rear housing. Replacement Note: The bottom section of cable bundle routes through the lower notch on the optical pressure wall.
Cable, AC/DC Power/Backlight/ SATA, SSD First Steps Remove • Glass panel • LCD panel • Power supply • Backlight pressure wall • Optical drive • Optical fan • IR board • Memory • AirPort card • AirPort carrier • Logic board Tools • • • Magnetized Torx T10 screwdriver Black stick ESD-wrist strap and mat 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Cable, AC/DC Power/Backlight/SATA, SSD 262
Removal 1 Disconnect SSD drive power cable from top of SSD drive. 2 Release cable from black cable clips and lift out of rear housing.
Replacement Note: The bottom section of cable bundle routes through the lower notch on the optical pressure wall.
Microphone Cable First Steps The microphone cable is part of the rear housing and is not available as a separate part. Refer to the rear housing procedure.
Rear Housing First Steps Remove • Glass panel • LCD panel • Camera • Bluetooth board • AirPort cable • AirPort carrier board • Backlight board • Power supply • Hard drive • SSD drive (CTO option) • Bluetooth cable • Camera cable • Camera • Optical drive • Optical drive fan • SD Card Reader • SD cable • Audio cable • IR board & cable • Logic board • DC/SATA/SSD/ backlight power cable • CPU fan • Ambient temp sensor • Left speaker • Right speaker • Hard drive fan • Mechanism cover • Stand • Mechanism • Press
Reassembly When replacing the rear housing follow these important steps: 1 Handling: Handling the rear housing incorrectly could flex aluminum and cause alignment issues. Always handle rear housing with 2 hands in the lower left and right corners. Never carry rear housing with a single hand, or by the aluminum “chin” near the Apple logo. 2 Optical Drive Bezel When replacing the rear housing, if the unit has a Sony optical drive mechanism, it may need a different optical drive bezel.
3 Remove foil tape and gaskets. Examine plastic tabs under foil tape. Notice that some tabs go on the outside surface and some on inside surface of the drive. 4 Remove 4 bezel screws, 2 on each side. 5 Remove old bezel and install new bezel, taking care that tabs are properly aligned. 6 Reinstall 4 screws. 7 Apply new foil tape and 2 gaskets (included with new bezel kit) as shown. 8 Once computer is fully reassembled, test optical drive (inject, read, eject) before returning to customer.
9 Transfer Camera and Reuse Thermal Paste: Transfer camera from old rear housing to new rear housing and reuse thermal paste from old rear housing. Use a black stick to remove and reapply thermal paste to camera (circled). Note: A syringe of thermal paste is available as needed, part number 9229625, good for 5 applications. Important: This white thermal paste should NOT be used for any other purpose (such as portable computer heatsinks).
11 Place the two new pieces of aluminum tape over the right and left sides of the mechanism cover 12 Transfer: Bluetooth and AirPort antennas Bluetooth cable camera cable 3 pressure walls • • • • 13 Replace the remaining modules.
Service Source Additional Procedures iMac (27-inch, Mid 2010) © 2010 Apple Inc. All rights reserved.
Retrieving Mechanism Overview Without a stand or VESA mount installed, the mechanism can retract inside the computer if an access card trips the latch that locks the mechanism. In the rare event that retrieving the mechanism is necessary, follow this procedure. Note: You may notice small differences in appearance between the images in this procedure and the computer you are servicing. Although the appearance may differ, the steps and sequence are the same unless noted.
Removal 1 Place computer face down on a clean, soft surface. 2 Peer into stand slot to see recessed latch. Latch is a shiny metal spring clip located above mechanism that is almost as wide as stand slot. 3 Cut access card in half vertically, into two equal halves. 4 Insert half of access card into one end of stand slot and push latch away to get a sense of how latch moves.
5 Notice shape of retrieval tool. When inserting retrieval tool, make sure curved end of tool is down, as shown. 6 The small hole on end of retrieval tool will hook onto pin on recessed mechanism. 7 Hold access card so latch is pushed as far as possible. 8 Align retrieval tool over pin on mechanism. 9 Have an assistant hold computer down firmly as you simultaneously push latch away and pull mechanism towards you.
10When you can pull up mechanism and see it emerge through slot, maintain pull force on retrieval tool, but remove access card. 11 Pull up mechanism until it clicks or locks into place. 12 Mechanism is now ready to accept installation of stand or VESA mount.
Service Source Views iMac (27-inch, Mid 2010) © 2010 Apple Inc. All rights reserved.
Exploded Views Exploded View #1 2010-09-09 iMac (27-inch, Mid 2010) Views — Exploded Views 277
Exploded View #2 2010-09-09 iMac (27-inch, Mid 2010) Views — Exploded Views 278
Exploded View #3 2010-09-09 iMac (27-inch, Mid 2010) Views — Exploded Views 279
External Views Rear View 2010-09-09 iMac (27-inch, Mid 2010) Views — External Views 280
Ports 1 - Headphone out/optical digital audio out port 2 - Audio in/optical digital audio in port 3 - USB 2.
Internal Views Photo of Components below LCD 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Internal Views 282
Photo of Components in the Rear Housing 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Internal Views 283
Logic Board, Front Side 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Internal Views 284
Logic Board, Back Side 2010-09-09 iMac (27-inch, Mid 2010) Take Apart — Internal Views 285
Screw Chart Note: Screws are not to scale.
922-9236 T10 922-6800 T10 922-9237 T10 Optical fan (1), CPU fan (2), Hard drive fan (1) Logic board, short (2), Mechanism cover, small (2) Logic board, medium 20mm (2) 922-9243 T10 922-9242 T10 922-9238 T10 Logic board, long, 24mm (4) Right speaker (1), Left speaker (1) Mechanism cover (2), Mechanism (6) 922-8174 T10 922-9488 T8 922-7018 T10 Stand (8) SDD bracket to SSD drive (1) Optical drive bezel to ODD (4) 922-7971 T10 Video card bracket (1) 2010-09-09 iMac (27-inch, Mid 2010) Views
