Apple Technician Guide LED Cinema Display (24-inch) Updated: 2010-02-08
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.
LED Cinema Display (24-inch) Contents About This Manual Updates 7 Updated 8 February 2010 7 Updated 28 October 2009 7 Updated 2 December 2008 7 Feedback 7 Basics Overview 9 Identifying Features 9 System Requirements 9 Product Configurations 9 Rear View 10 Ports 10 All-In-One Cable 10 Serial Number Location 11 Serial Number on Stand 11 Serial Number on Mechanism 11 Troubleshooting General Troubleshooting 13 Troubleshooting Theory 13 Hardware vs.
Uncategorized Symptoms Display Issues 22 23 Blank / No Video, No Backlight 23 Noise / Unstable Flicker 24 LCD Image Issues 26 Physical Damage 30 Uncategorized Symptoms 30 Input/Output Issues 31 USB Issues 31 Camera Issues 32 Audio Issues 33 Uncategorized Symptoms Mechanical Issues 36 37 Noise, Hum or Vibration 37 Fan Failures / Thermal Issues 39 Mechanical Physical Damages 40 Uncategorized Symptoms 40 Take Apart General Information 42 Opening the Unit 42 Required Tools 42 Required Special Tools
Power Supply Blower 59 61 Removal 62 Replacement 63 Camera 64 Subwoofer AC Inlet 66 68 All-in-One Cable 70 Speakers 72 Removal 73 Replacement 73 Stand 74 Mechanism 77 Rear Housing 79 Additional Procedures VESA Mount 81 Retrieving Mechanism 84 Views Exploded View 89 Cable Routing Diagram Photo of Interior Screw Chart 92 91 90
Apple Technician Guide About This Manual LED Cinema Display (24-inch) © 2010 Apple Inc. All rights reserved.
Updates Updated 8 February 2010 • • • Troubleshooting: General: Test Points Diagram, added TP61 Troubleshooting: Symptom Charts: “Dead Unit / No Power”: • Step 5: changed “Yes” Action to lead to Blank/No Video, Step 3; • Step 8, corrected voltage for TP11 to 24.5VDC (was incorrectly noted as 15VDC); • Step 9, corrected “TP11” to “TP13”. Troubleshooting: Symptom Charts: “Camera Issues”: added link to kBase #HT3957: “About the LED Cinema Display iSight Camera Firmware Update 1.0”.
Apple Technician Guide Basics LED Cinema Display (24-inch) © 2010 Apple Inc. All rights reserved.
Overview Identifying Features The LED Cinema Display (24-inch) is an active-matrix LCD with LED backlight that includes a built-in iSight camera, a 2.1 speaker system, and a microphone. The native resolution is 1920 x 1200 pixels. The all-in-one cable creates a docking station for portable computers, providing a MagSafe power connection, Mini DisplayPort video connection, and a 3-port USB hub. The unit has no buttons. Power is controlled by the state of the connected computer.
Rear View The stand is removable in order to allow the use of a VESA mount. Ports The 3-port USB 2.0 hub can power three ports at 1.1A each, or up to two ports at 1.5A each. All-In-One Cable Includes (left to right): USB, Mini DisplayPort, and MagSafe power.
Serial Number Location Serial Number on Stand The LED Cinema Display (24-inch)’s serial number is located on the base of the stand. When replacing a stand, transfer the serial number to the new stand. Serial Number on Mechanism The LED Cinema Display (24-inch)’s serial number is also located on the hinge mechanism inside, for users who remove the stand to use a VESA mount. When replacing a mechanism, transfer the serial number label to the new mechanism.
Apple Technician Guide Troubleshooting LED Cinema Display (24-inch) © 2010 Apple Inc. All rights reserved.
General Troubleshooting Troubleshooting Theory For general information on troubleshooting theory, go to GSX and find the Service Training course menu link. From there you can access the Troubleshooting Theory self-paced course. Hardware vs.
Functional Overview A guide to possible symptoms as they relate to ports on the main logic board: LCD Function Interface DC In • No power to LCD • No LED backlight • No power LED Driver (Backlight) • No LED backlight • Dim or low brightness Blower (Fan) • No rotation leading to overtemp condition • Excessive noise/vibration due to faulty fan * Also see Fan (1) & LCD (2) Temp Sensors symptoms below.
Block Diagram Refer to this diagram to see how modules are interrelated: 2010-02-08 LED Cinema Display (24-inch) Troubleshooting — General Troubleshooting 15
Test Points Diagram Refer to this diagram to see the location of test points and instructions for their use: Warning: HIGH VOLTAGE: Use extreme caution when live testing. • Never touch the power supply. • Do NOT lean over or accidentally touch power supply area during live testing.
Symptom Charts Follow steps in the order indicated below. If an action resolves the issue, retest system to verify. Note: A compilation of Quick Check tables is available at: http://service.info.apple.com/QRS/en/quickreference.pdf Startup and Power Issues Dead Unit / No Power Unlikely cause: LCD panel, blower, subwoofer, speakers, camera, microphone Quick Check Symptoms Quick Check Dead Unit / No Power • No power • No image • No fan spin • Non-operational 1. Verify power source. 2.
2010-02-08 2. Unplug and replug the Mini DisplayPort connector into a supported system and monitor the portable’s display. Verify that the portable’s display briefly turns off then back on. Yes Logic board OK. Go to Blank/No Video symptom code flow. No Go to step 3. 3. Remove LCD panel and disconnect LCD function interface cable. Verify voltage on logic board between test point TP11 (24.5VDC) and chassis ground (GND) is 23.3–25.7 VDC. Yes 24.5VDC from power supply OK. Go to step 4.
9. Disconnect all connectors from the logic board EXCEPT the power supply cable. Verify voltages on logic board between test points TP61 (3.3VDC) and chassis ground (GND) is 3.1–3.5 VDC, and between TP13 (12VDC) and chassis ground (GND) is 11.4–12.6 VDC. Yes Power supply OK. Suspect possible short, damaged connector, or faulty sensor/ fan/speaker. Reconnect connectors one at a time and retest for 3.3VDC at TP61 and 12VDC at TP13. Replace affected part that causes the 3.3VDC or 12VDC voltages to disappear.
MagSafe Adapter – No Power Unlikely cause: LCD panel, logic board, blower, subwoofer, speakers, camera, microphone Quick Check Symptoms Quick Check MagSafe Adapter – No Power • No power to MagSafe connector • MagSafe connector status LED does not illuminate • No power to portable computer without battery 1. Verify power source. 2. Verify display is operating. 3. Ensure MagSafe connector and receptacle are clean. 4.
Sleep/Wake Issue Unlikely cause: LCD panel, blower, subwoofer, speakers, camera, microphone Quick Check Symptoms Quick Check Sleep/Wake Issue • Won’t go to sleep or wake up from sleep 1. Verify display is being used with supported system. 2. Use with known-good system. If used as second display, check display preferences to see if display is recognized by system. 3. Verify USB/display/power connectors are fully seated. 4. Check brightness setting. Deep Dive Check 2010-02-08 Result Action 1.
5. Disconnect DC power cable from J0121 on logic board. Verify cable voltage at connector between Pin 1 (24.5VDC) and Pin 3 (GND) is 23.3–25.7 VDC. Yes Power to logic board. Replace logic board. M01 No No power to logic board. Replace power supply. P01 6. Verify all connections between logic board and LCD are secure. Visually inspect cables and connectors for any debris, damage, or bent pins.
Display Issues Blank / No Video, No Backlight Unlikely cause: power supply, blower, subwoofer, speakers, camera, microphone Quick Check Symptoms Quick Check Blank / No Video, No Backlight • No video • No backlight • Dim backlight 1. Verify display being used with supported system. 2. Verify USB/display/power connectors are fully seated. 3. Use with known-good system. If used as second display, check display preferences to see if display is recognized by system. 4. Check brightness setting.
4. Verify that the LCD function interface cable and LED driver cable connections are secure. See Functional Overview. Yes If connections are OK and secure and the display is still blank, go to step 5. No If cable is damaged, replace all-in-one cable or replace function cable. 5. Shine bright (low heat) flashlight into the front of the LCD. Verify if an image is being displayed. Yes Image present but backlight is not ON. Go to step 6. No Replace LCD panel. L03 6.
2010-02-08 2. Verify display’s USB hub and built-in camera are listed in the System Profiler’s USB device tree is not disappearing intermittently (refresh System Profiler to observe). Yes Power supply OK. Go to step 3. No Go to Dead Unit/No Power symptom code flow. 3. Unplug and replug the Mini DisplayPort and USB connectors into a supported powered-up portable system and monitor the portable’s display. Verify that the portable’s display briefly turns off then back on.
LCD Image Issues Quick Check Symptom Quick Check LCD Issues • Pixel anomalies • Non-uniform brightness • Incorrect/missing colors • Distorted/blurred image • Vertical/horizontal lines 1. Allow display to reach normal operating temperature for about 15 minutes before evaluating front-of-screen performance. 2. Verify display being used with supported system. If used as second display, check display preferences to see if display is recognized by system. 3.
Deep Dive: Pixel Anomalies Unlikely cause: logic board, power supply, blower, subwoofer, speakers, camera, microphone Check Result 1. Determine if “defects” are dust/ debris on surface of glass panel or LCD panel. Action Yes Clean glass/LCD panel. Note: If debris is inside LCD, it can’t be cleaned, therefore replace LCD panel. No Go to step 2. 2. Determine if bright pixel defects exceed the acceptable number. See kBase #HT1721 Yes Replace LCD panel.
Deep Dive: Incorrect/Missing Colors Unlikely cause: power supply, blower, subwoofer, speakers, camera, microphone Check 2010-02-08 Result Action 1. Verify display’s USB hub and built-in camera are listed in the System Profiler’s USB device tree. Yes Power supply and USB communication OK. Go to step 2. No Go to USB Issues symptom code flow. 2. Verify System Preferences: Displays: Color is using a valid display profile for this display.
Deep Dive: Distorted/Blurred Image Unlikely cause: power supply, blower, subwoofer, speakers, camera, microphone Check Result Action Code 1. Verify display’s Mini DisplayPort connector is plugged into known-good system. Yes Go to step 2. No Connect Mini DisplayPort cable to known-good system. 2. Reseat Mini DisplayPort cable at system and display logic board. Determine if image corruption issue was resolved. Yes Loose cable. Issue resolved. No Go to step 3. 3.
Physical Damage Quick Check Symptom Quick Check Physical Damage • Cracked LCD • Scratched LCD polarizer • Scorched or melted LCD • LCD impact damage 1. Determine damage caused by user/technician environment, accidental damage, or abuse. 2. Inform user/technician the failures are not covered by Apple warranties. Refer to http://www.apple.com/legal/warranty Uncategorized Symptoms Deep Dive Check Result 1. Verify whether existing symptom code applies to the issue reported by the user.
Input/Output Issues USB Issues Unlikely cause: LCD panel, blower, subwoofer, speakers Quick Check Symptoms Quick Check USB Issues • External USB device(s) not recognized • Wired USB keyboard/mouse not recognized 1. Verify display’s USB and Mini DisplayPort connectors are plugged into known-good supported system. 2. Launch System Profiler and confirm that display’s USB hub is visible. Deep Dive Check 2010-02-08 Result Action Code 1.
6. Verify that USB device is supported with the system and Mac OS X version being used. Yes Go to step 7. No Refer to device manufacturer for compatibility support. 7. Verify that USB device works with another known good display. Yes Replace logic board. No Refer to device manufacturer for compatibility support.
3. Launch PhotoBooth. Verify that green LED near camera lens turns on. Yes Go to step 4. No Replace camera. Retest. 4. Launch PhotoBooth. Verify that camera image appears normal. Yes Repair completed. No Clean camera lens. If needed, replace camera. Retest. M13 M13 Audio Issues Unlikely cause: LCD panel, power supply, blower, camera Quick Check Symptoms Quick Check Audio Issues • Internal speakers not recognized • No sound • Garbled sound • No bass • No treble • Microphone not working 1.
2010-02-08 3. Launch System Preferences: Sound and select ‘sound output’ options. Verify output option is set to display’s internal speakers. Yes Go to step 6. No Set output to internal speakers. Retest. If needed, replace logic board. L11 4. Disconnect USB uplink cable from logic board and system. Inspect cable connectors and cable under magnification for pinched cables and damaged or bent pins. Yes Replace all-in-one cable. L14 No Go to step 5. 5. Disconnect USB uplink cable from logic board.
Deep Dive: Audio Issues, Microphone Check 2010-02-08 Result Action Code 1. Verify display’s USB and Mini DisplayPort connectors are plugged into known-good supported system. Yes Go to step 2. No Connect display’s USB and Mini DisplayPort connectors to system. Go to step 2. 2. Determine if user-reported issue is with display’s internal speakers. Yes Go to Audio Issues: General symptom code flow. No Go to step 3. 3. Launch System Preferences and select Sound input options.
Uncategorized Symptoms Deep Dive Check Result 1. Verify whether existing symptom code applies to the issue reported by the user. 2010-02-08 Action Yes Jump to appropriate symptom code flow. No Document reported failure and send feedback to smfeedback6@apple.com stating that a suitable symptom code wasn’t found.
Mechanical Issues Noise, Hum or Vibration Unlikely cause: LCD panel, logic board, all-in-one cable, camera Quick Check Symptoms Quick Check Noise, Hum or Vibration • Buzzing noise • Rattling noise • Ticking noise • Squeaking 1. Verify display’s USB and Mini DisplayPort connectors are plugged into known-good supported system. 2. Tilt display to hinge limits to determine if mechanical noise is generated by the hinge mechanism. Repair/replace mechanism if needed. 3.
2010-02-08 4. Remove blower and inspect blades for damage or obstructions. Yes Replace blower. No Go to step 5. 5. Remove blower and rotate blades. Verify that fan blades spin smoothly without interference from blower housing. Yes Go to step 6 No Replace blower. Retest. 6. Reinstall blower while carefully ensuring that there are no cables routed under or near blower assembly that might cause interference with the fan blades. After reassembling verify that noise is resolved.
Fan Failures / Thermal Issues Quick Check Symptoms Quick Check Fan Failures / Thermal Issues • Washed out image • No, slow, fast fan spin • Excessive heat exhaust • Eventual shutdown of display 1. Remove air vent obstructions. 2. Verify display is functional. 3. Ensure the display on a stable work surface that allows for adequate air circulation under and around the unit. Deep Dive Check 2010-02-08 Result Action 1.
Mechanical Physical Damages Quick Check Symptoms Quick Check Mechanical Physical Damages • Broken glass • Bent stand • Broken hinge • Stripped screw/head/boss • Dent or scratch to chassis • Damaged cable/connector 1. Determine damage caused by user/technician environment, accidental damage, or abuse. 2. Inform user/technician the damage is not covered by Apple warranties. Refer to http://www.apple.com/legal/warranty Deep Dive Check Result Action Code 1.
Apple Technician Guide Take Apart LED Cinema Display (24-inch) © 2010 Apple Inc. All rights reserved.
General Information Opening the Unit • • • The LED Cinema Display (24-inch) 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. Follow all cleaning and handling instructions to prevent damaging glass panel or LCD panel. Follow ESD precautions when glass panel is removed.
Cleaning Tools Starter Kit The following tools are offered in the cleaning starter kit (076-1277): • Suction cups, 1 pair • Gloves, lint-free, anti-static, 2 pairs • Sticky silicone roller (6-inch) to clean the glass panel • Sticky sheets to clean the silicone roller, 2 pads • Polishing cloths, clean, anti-static, optical-grade micro-fiber “terry” style, 5 cloths • Microfoam bag to store the glass panel, 5 bags • ESD bag for LCD panel storage, 5 bags Cleaning Tool Resources Note: Apple Retail technicians s
• If silicone roller is no longer tacky, wash it in warm soapy water or wipe with isopropyl alcohol. If tackiness does not return, replace silicone roller. DON’T • Touch inside of glass with bare hands or dirty gloves. Fingerprints are difficult to remove. • Place glass panel onto a work surface where it may collect dust and other contaminants unless it has first been placed into a protective microfoam bag.
Safety WARNING: HIGH VOLTAGE: The LED Cinema Display (24-inch) contains an AC/DC power supply and logic board that pose a shock hazard. When the unit is under power, be aware that the power supply and logic board contain high voltages that pose a potential hazard to your personal safety. Never work on or near the power supply or logic board with the unit powered on; and as a further precaution, always make sure the unit is unplugged when working on it with the glass panel and LCD removed.
Glass Panel First Steps • • • • Shut down unit. Wait 10 minutes. 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.
Removal Glass panel is held in place by magnets in the rear housing. 1 Lay display on its back and press clean suction cups in opposite corners on glass panel. Apple strongly recommends wearing clean, lint-free gloves whenever handling the glass panel, to reduce cleaning required on reassembly. 2 Lift panel straight up and off. 3 Remove suction cups and slide glass into protective microfoam bag (922-8259).
Replacement 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 Wearing clean gloves, set display 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 Note alignment pins on inside of glass panel. Caution: Pins can break off if glass panel is removed or installed at an improper angle.
8 Wearing clean gloves, place glass directly onto unit. Magnets will catch it and hold it in place. Make sure the glass is flush with the rear housing after it is reinstalled. 9 Clean the outside of the glass panel with a clean microfiber cloth. If necessary, use a small amount of iKlear polish. Wipe the glass until there is no longer any residue or haze. 10 Once the glass has been cleaned and polished, inspect the glass for any remaining dust, fingerprints, or a hazy residue.
LCD Panel First Steps Remove: • Glass Panel Tools • • • • ESD wrist strap lint-free gloves Torx T10 screwdriver ESD bag to store LCD panel (922-8258) 2010-02-08 LED Cinema Display (24-inch) Take Apart — LCD Panel 51
Removal 1 Remove 6 screws: T10, 922-8685 2 Raise bottom edge of LCD a few inches using mylar tabs. Careful! There are 4 cables to disconnect in next step.
3 Disconnect 4 cables (as shown left to right): 1. Ambient Temp Sensor 2. AIO Video 3. LCD Function Interface 4.
Replacement Reassembly is an exact reversal of the steps. Note: When reinstalling there are two protective bumpers to prevent damage to the camera. Replacement Note: If installing a new LCD panel, transfer the foam square and retaining clip for the ambient temp sensor cable (922-8671).
Logic Board First Steps Remove: • Glass Panel • LCD Panel Warning: HIGH VOLTAGE: IF UNIT IS PLUGGED INTO POWER SOURCE, use extreme caution when working around the logic board. There is a highvoltage capacitor on the reverse side of board.
Removal 1 Remove 6 screws: T10, 922-8685 2 Loosen or remove clear tape securing cables.
3 Disconnect 11 cable connectors: 1. 2. 3. 4. power blower camera (922-8670) sensor/blower (922-8672) 5. sensor/LCD (922-8671) 6. microphone 7. subwoofer 8. left speaker 9. right speaker 10. USB uplink from all-in-one cable 12. LCD function interface (922-8669; if not previously removed with LCD panel) For your reference: #11 indicates location of LED driver (backlight) cable connection, which was disconnected during LCD panel removal.
Replacement Reassembly is an exact reversal of the steps. Note: Connect 10 cables with reverse side of MLB facing you, then flip board over and connect USB uplink cable (#10). 1. power 2. blower 3. camera 4. sensor/blower 5. sensor/LCD 6. microphone 7. subwoofer 8. left speaker (4-pin) 9. right speaker (3-pin) 12. LCD function interface Tip: Tape down the USB uplink cable (#10) to ensure it doesn’t get pinched. Shown for reference: 11.
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 1 Remove 4 screws: T10, 922-8685 2 Disconnect 3 cables: 1 from logic board and 2 from below the power supply. 3 Preserve adhesive “butterfly” strip for reuse. Replacement Reassembly is an exact reversal of the steps.
Blower First Steps Remove: • Glass Panel • LCD Panel Tools • • ESD wrist strap Torx T10 screwdriver 2010-02-08 LED Cinema Display (24-inch) Take Apart — Blower 61
Removal 1 Remove 3 screws: T10, 922-8684 2 Disconnect 2 cables from logic board. 3 Remove ambient temp sensor cable (922-8672) from blower, preserving black tape for reuse.
Replacement Reassembly is an exact reversal of the steps above, with 3 notes: Note 1: The ambient temp sensor cable (9228672) must extend exactly 1cm from the plastic retaining ring on the blower casing so that it will sit the proper distance from the rear housing when installed. Incorrect sensor placement can lead to false temperature readings and unusual fan behavior. Note 2: Ensure the pressure wall section attached to the blower fits securely into foam on rear housing for a snug fit.
Camera First Steps Remove: • Glass Panel • LCD Panel Tools • • ESD wrist strap Torx T10 screwdriver 2010-02-08 LED Cinema Display (24-inch) Take Apart — Camera 64
Removal 1 Remove 2 screws: T10, 922-8680 2 Lift the camera and bracket from the rear housing. 3 Lift clear tape and remove the camera cable (922-8670) connector from the camera assembly. Replacement Reassembly is an exact reversal of the steps. Note: If you have trouble reconnecting cables to the logic board, unscrew and flip over logic board for better access to connectors.
Subwoofer First Steps Remove: • Glass Panel • LCD Panel Tools • • ESD wrist strap Torx T10 screwdriver 2010-02-08 LED Cinema Display (24-inch) Take Apart — Subwoofer 66
Removal 1 Remove 4 screws: T10, 922-8681 2 Peel up tape and disconnect 2-pin subwoofer cable from logic board Replacement Reassembly is an exact reversal of the steps. Note: If you have trouble reconnecting cables to the logic board, unscrew and flip over logic board for better access to connectors.
AC Inlet First Steps Remove: • Glass Panel • LCD Panel • Subwoofer Note: AC Inlet is not available as a separate part, but only as part of the Rear Housing.
Removal 1 Remove 4 screws: T10, 922-8685 (3) T10, 922-8683 (1) on grounding wire 2 Loosen or remove tape on cables and pressure wall. 3 Disconnect cable from power supply. Replacement Reassembly is an exact reversal of the steps.
All-in-One Cable First Steps Remove: • Glass Panel • LCD Panel • Subwoofer • AC Inlet Tools • • ESD wrist strap Torx T10 screwdriver 2010-02-08 LED Cinema Display (24-inch) Take Apart — All-in-One Cable 70
Removal 1 Remove 2 screws: T10, 922-8685 and metal strain relief support (922-8689) 2 Loosen or remove tape on cables. Aluminum tape can be fragile. 3 Disconnect black cable from the power supply. 4 Disconnect USB uplink cable from the logic board. 5 Pry up ferrite beads with a black stick. 6 Push the all-in-one cable through the opening in the rear housing, feeding the three cable ends through the hole one at a time. Replacement Reassembly is an exact reversal of the steps.
Speakers First Steps Remove: • Glass Panel • LCD Panel Note: Left Speaker and Right Speaker are available as separate parts, but are also included as part of a replacement Rear Housing.
Removal 1 Using a black stick, pry the speaker away from the rear housing. Caution: Adhesive is very strong and may require superhuman force to remove. 2 Disconnect cable from logic board. Replacement 1 Align speaker with magnet and press to secure adhesive. 2 Connect cable to logic board. Note: Left speaker has a 4-pin connector and right speaker has a 3-pin connector. Note: If you have trouble reconnecting cables, unscrew and flip over logic board for better access. 3 Secure cable with tape.
Stand First Steps Remove: • Glass Panel • LCD Panel Note: If Stand is the only part to be replaced, use VESA Mount procedure rather than removing Glass Panel and LCD Panel.
Removal 1 Remove 8 screws along back row of mechanism: T10, 922-8749 2 Tilt rear housing forward to release stand.
Replacement Reassembly is an exact reversal of the steps. Note: Slide rear housing over stand, aligning pin on mechanism with center hole on stand. Replacement Note: If replacing stand, transfer serial number to new part.
Mechanism First Steps Remove: • Glass Panel • LCD Panel • Subwoofer • Stand Tools • • ESD wrist strap Torx T10 screwdriver 2010-02-08 LED Cinema Display (24-inch) Take Apart — Mechanism 77
Removal 1 Remove 4 screws: T10, 922-8682 2 Peel EMI mesh tape off the rear housing. Replacement Reassembly is an exact reversal of the steps. Note: Install mechanism onto the rear housing with the serial number showing at the top. Replacement Note: If replacing mechanism, transfer serial number sticker to new part.
Rear Housing First Steps Remove: • Glass Panel • LCD Panel • Logic Board • Power Supply • Blower • Camera • Subwoofer • AC Inlet (loosen screws to access AIO cable) • All-In-One Cable • Stand • Mechanism With all the modules removed, you are left with the rear housing assembly. Note: The rear housing replacement part includes the AC inlet, left & right speakers, microphone cable, mylar for the power supply & logic board, bumper blocks, and thermal gaskets.
Apple Technician Guide Additional Procedures LED Cinema Display (24-inch) © 2010 Apple Inc. All rights reserved.
VESA Mount First Steps No preliminary steps are required.
Removal 1 Place unit face down on a table so that base of stand extends over table edge. 2 Press stand down and insert access card into slot between top of stand and rear housing. 3 Insert access card as far as it will go, and press stand down until you hear a click — the audible cue that indicates stand is locked into place. 4 Remove access card.
5 Remove 8 screws: T10, 922-8749 6 Remove stand from mechanism. Reassembly Note: Align pin on mechanism to central hole in stand.
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.
Removal 1 Place unit 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 unit down firmly as you simultaneously push latch away and pull mechanism towards you.
10 When 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.
Apple Technician Guide Views LED Cinema Display (24-inch) © 2010 Apple Inc. All rights reserved.
Exploded View Clicking on any part below will link you to the corresponding take-apart section.
Cable Routing Diagram 2010-02-08 LED Cinema Display (24-inch) Views — Cable Routing Diagram 90
Photo of Interior A view of the LED Cinema Display (24-inch) with the glass panel and LCD panel removed, showing all modules and cable routing.
Screw Chart All screws for the LED Cinema Display (24-inch) are Torx 10.
