IdeaCentre A720 Hardware Maintenance Manual ideaideaideaCentreidea
IdeaCentre A720 Hardware Maintenance Manual
Contents Chapter 1. About this manual . . . . . . 1 Important Safety Information . . . . . . . . . . 1 Chapter 2. Safety information . . . . . . 3 General safety . . . . . . . . . . . . Electrical safety . . . . . . . . . . . Safety inspection guide . . . . . . . . Handling electrostatic discharge-sensitive devices . . . . . . . . . . . . . . Grounding requirements . . . . . . . . Safety notices . . . . . . . . . . . . . . . . . . . . . . . . 3 3 5 . . . . . . . . . . . . 5 6 6 Chapter 3.
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Chapter 1. About this manual This manual contains service and reference information for IdeaCentre A720 computers listed on the cover. It is intended only for trained servicers who are familiar with Lenovo computer products. Before servicing a Lenovo product, be sure to read the Safety Information. The description of the TV-tuner card in this manual applies only to computers with a TV-tuner card installed. It does not apply to computers without a TV-tuner card.
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Chapter 2. Safety information This chapter contains the safety information that you need to be familiar with before servicing a computer. General safety Follow these rules to ensure general safety: • Keep the areas around the computer clear and clean during and after maintenance. • When lifting any heavy object: 1. Ensure you can stand safely without slipping. 2. Distribute the weight of the object equally across both feet. 3. Lift slowly. Never move suddenly or twist when you attempt to lift. 4.
Observe the following rules when working on electrical equipment. Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have rubber floor mats near their equipment that contain small conductive fibers to decrease electrostatic discharge. • Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet.
– Switch off power. – Send another person to get medical aid. Safety inspection guide The intent of this inspection guide is to assist you in identifying potential hazards posed by these products. Each computer, as it was designed and built, had required safety items installed to protect users and service personnel from injury. This guide addresses only those items.
• Keep the parts in protective packages until they are inserted into the product. • Avoid contact with other people while handling the part. • Wear a grounded wrist strap against your skin to eliminate static on your body. • Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when you are wearing a wrist strap. • Use the black side of a grounded work mat to provide a static-free work surface. The mat is especially useful when handling ESD-sensitive devices.
To Connect To Disconnect 1. Turn everything OFF. 1. Turn everything OFF. 2. First, attach all cables to devices. 2. First, remove power cords from outlets. 3. Attach signal cables to connectors. 3. Remove signal cables from connectors. 4. Attach power cords to outlet. 4. Remove all cables from devices. 5. Turn device ON. CAUTION: When replacing the lithium battery, use only Part Number 45C1566 or an equivalent type battery recommended by the manufacturer.
≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs) CAUTION: Use safe practices when lifting. CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source. 2 1 CAUTION: Do not place any object weighing more than 82 kg (180 lbs.
Chapter 3. General information This chapter provides general information that applies to all computer models covered by this manual. Specifications This section lists the physical specifications for your computer. This section lists the physical specifications for your computer. Type IdeaCentre A720 This section lists the physical specifications.
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Chapter 4. General Checkout Attention: The drives in the computer you are servicing might have been rearranged or the drive startup sequence may have been changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be overwritten if you select an incorrect drive. General error messages appear if a problem or conflict is found by an application, the operating system, or both.
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Chapter 5. Using the Setup Utility The Setup Utility program is used to view and change the configuration settings of your computer, regardless of which operating system you are using. However, the operating system settings might override any similar settings in the Setup Utility program. Starting the Lenovo BIOS Setup Utility program To start the Lenovo BIOS Setup Utility program, do the following: 1.
Administrator Password Setting an Administrator Password deters unauthorized persons from changing configuration settings. You might want to set an Administrator Password if you are responsible for maintaining the settings of several computers. After you set an Administrator Password, a password prompt is displayed every time you access the Lenovo BIOS Setup Utility program. If both the Administrator and Power-On Password are set, you can type either password.
To set a Power-On Password, do the following: 1. Start the Lenovo BIOS Setup Utility program (See ”Starting the Lenovo BIOS Setup Utility program” on page 13.) 2. From the Security menu, select Set Power-On Password and press the Enter key. 3. The password dialog box will be displayed. Type the password, then press the Enter key. 4. Re-type the password to confirm. If you typed the password correctly, the password will be installed. To change a Power-On Password, do the following: 1.
Select ATA Device Setup, press the Enter key, then select SATA Mode. Select Audio Setup, press the Enter key, then select Onboard Audio Controller. Select Network Setup, press the Enter key, then select Onboard Ethernet Support or LAN Boot Agent. 4. Select Disabled or Enabled and press the Enter key. 5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option. 6. Select Save changes and Exit from the menu. Notes: a.
a. If you do not want to save the settings, select Discard changes and Exit from the menu. b. If you have changed these settings and want to return to the default settings, select Load Optimal Defaults from the menu. Exiting the Lenovo BIOS Setup Utility program After you finish viewing or changing settings, press the Esc key to return to the Lenovo BIOS Setup Utility program main menu. You might have to press the Esc key several times.
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Chapter 6. Symptom-to-FRU Index The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with Chapter 4, “General Checkout,” on page 11. This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to “Undetermined problems” on page 20. Notes: • If you have both an error message and an incorrect audio response, diagnose the error message first.
POST error codes Each time you turn the computer on, it performs a series of tests to check that the system is operating correctly and that certain options are set. This series of tests is called the Power-On Self-Test, or POST. POST does the following: • Checks some basic motherboard operations • Checks that the memory is working correctly • Starts video operations • Verifies that the boot drive is working POST Error Message Description/Action Keyboard error Cannot initialize the keyboard.
Chapter 7. Locating connectors, controls and components This section provides illustrations to help locate the various connectors, controls and components of the computer. Font view The following illustration shows the location of controls and components on the front of the computer. Attention: Be careful not to block any air vents on the computer. Blocked air vents can cause overheating. 1 3 4 5 6 7 8 2 9 10 11 12 13 14 15 1. Built-in microphone 9. Monitor On/Off 2. Built-in camera 10.
Left and right view The following illustration shows the location of connectors, controls and components on the left and right side of the computer. 10 9 1 2 3 4 5 6 7 8 1. Air vents 6. Optical drive 2. USB 3.0 connector 7. B-CAS card slot (Japan models only) 3. HDMI-in connector (selected models only) 8. Memory card reader 4. HDMI-out connector 9. Power button 5. Eject button 10. Anti-scratch protector Attention: Do not insert 3-inch discs into the optical drive.
Rear view The following illustration shows the location of connectors and components on the rear of the computer. 1 2 3 4 5 6 7 8 1. TV tuner connector (selected models only) 5. USB 2.0 connectors (2) 2. Headphone connector 6. Power connector 3. Microphone connector 7. Ethernet connector (RJ45) 4. USB 3.0 connector 8. Security cable slot Chapter 7.
Hardware components The following illustration shows the components that make up your computer. 4 5 6 7 31 8 30 9 29 28 27 10 11 12 13 26 14 25 15 16 17 18 19 20 24 23 21 22 1. System fan 17. Bluetooth module 2. Scalar board 18. Power switch board 3. Hard disk drive bracket 19. Front function board 4. Hard disk drive 20. Battery 5. Hard disk drive rubbers 21. Solid state disk 6. CPU 22. TV-tuner card 7. Base cover 23. Glass 8. Optical drive 24. Panel frame 9.
Identifying parts on the motherboard The motherboard (sometimes called the planar or system board) is the main circuit board in your computer. It provides basic computing functions and supports a variety of devices that are factory-installed or that you can install later. The following illustration shows the location of connectors and components on the front of the motherboard. 1. HDMI-out connector 12. TV jack 2 (Japan only) 2. HDMI-in connector 13. Card reader 3. USB 3.0 connector 14.
The following illustration shows the location of connectors and components on the back of the motherboard. 23. TV-Tuner card connector 26 IdeaCentre A720Hardware Maintenance Manual 24.
Identifying parts on the back of the LED panel The following illustration shows the components and controls on the back of LED panel. 1 2 3 4 8 7 6 1. Bluetooth module 5. Front function board 2. WLAN card 6. Converter board 3. Camera 7. Scalar board 4. Touch control board 8. Power switch board 5 Chapter 7.
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Chapter 8. Replacing hardware Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety information” in the Safety and Warranty Guide that was included with your computer. To obtain copies of the Safety and Warranty Guide, go to the Support Web site at: http://consumersupport.lenovo.com. Note: Use only parts provided by Lenovo. General information Pre-disassembly instructions Before starting the disassembly procedure, make sure that you do the following: 1.
Replacing the keyboard and mouse Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the keyboard and mouse Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step 3. Disconnect all cables attached to the computer.
Step 2. Locate the connector for the power cord. Refer to “Rear view”. Step 3. Disconnect the failing power cord and adapter from the computer and connect the new power cord and adapter to the same connector. Removing the base cover Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure.
Step 5. Return the computer to an upright position, then lift the base cover up and slide it out as shown. Step 6. To reattach the base cover: a. Line up the base cover with the base, slide it back and snap it into position. b. Place the computer face-down on a soft flat surface, then secure the base cover to the base with the 7 screws. Replacing the hard disk drive Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
Step 5. Remove the 2 screws that secure the hard disk drive to the motherboard. 1 Step 6. Disconnect the data and power cable from the hard disk drive. 2 2 1 1 Step 7. Slide the hard disk drive and rubber out of the bay as shown. Step 8. Detach the rubbers from the hard disk drive as shown. Step 9. Install the new hard disk drive as follows: a. Attach the rubbers to the new hard disk drive. b. Line up the new hard disk drive and slide it back into the hard disk drive bay. Chapter 8.
c. Secure the new hard disk drive to motherboard with the 2 screws. d. Connect the data and power cable to the new hard disk drive and motherboard. Step 10. Reattach the base cover and secure it with the screws. Replacing a memory module Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace a memory module Step 1.
Step 5. Remove the 3 screws that secure the system fan to the heat-sink. 1 Step 6. Disconnect the power cable from the motherboard. 2 Step 7. Lift the system fan up to remove it. 3 1 2 3 Step 8. Line up the new system fan, then secure it to the heat-sink and connect the new power cable to the motherboard. Step 9. Reattach the base cover and secure it with the screws. Replacing the heat-sink Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
Step 7. Remove the heat-sink by lifting it up. Attention: Place the heat-sink upside down on a flat surface to prevent thermal grease from contaminating other components. Attention: Use an alcohol pad to wipe the thermal grease off the heat-sink and CPU. Step 8. Use a thermal grease syringe to place 5 drops of grease on the top of the microprocessor. Each drop of grease should be 0.03ml (3 tick marks on the grease syringe). Step 9.
Step 8. Lift the microprocessor straight up and out of the socket. 3 1 2 3 Attention: Do not touch the gold contacts on the bottom of the microprocessor. When handling the microprocessor, touch only the sides. Note: Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be kept as clean as possible. Step 9. Holding the sides of the microprocessor with your fingers, remove the protective cover 1 that protects the gold contacts on the new microprocessor.
Step 11. Lower the microprocessor straight down into its socket on the motherboard. Step 12. To secure the microprocessor in the socket, close the microprocessor retainer and lock it into position with the small handle. Step 13. Use a thermal grease syringe to place 5 drops of grease on the top of the microprocessor. Each drop of grease should be 0.03ml (3 tick marks on the grease syringe). Step 14. Reattach the system fan, heat-sink, and base cover, then secure them with the screws.
Step 6. Remove the 3 screws that secure the optical drive to the motherboard and lift it up to remove it. Step 7. Remove the 5 screws that secure the optical drive to the bracket and disconnect the data cable from the optical drive. Step 8. Install the new optical drive as follows: Step 9. a. Connect the data cable to the new optical drive. b. Align the new optical drive with the bracket, push it into position and secure it with the 5 screws. c.
Replacing the solid state disk Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the solid state disk Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step 3. Disconnect all cables attached to the computer.
Step 6. Lift up the optical drive eject board to remove it. Step 7. To install the new optical drive eject board: Step 8. a. Connect the new optical drive eject board to the motherboard. b. Secure the new optical drive eject board to the motherboard with the 2 screws. Reattach the base cover and secure it with the screws. Replacing the motherboard Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the motherboard: Step 1.
Step 14. Remove the 8 screws that secure the motherboard to the chassis and slide it out as shown. Step 15. Remove the 2 screws that secure the TV-Tuner card to the motherboard. Step 16. Disconnect the antenna cable(s) from the TV-Tuner card. Step 17. Pull the TV-Tuner card upward to remove it from the card port.
Step 18. Use a flat head screwdriver as a lever to prise out the battery as shown. Step 19. To install the new motherboard: a. Insert the battery (CR2032) into the socket with the side labeled “+” facing up, and press the battery into place. b. Insert the notched end of the TV-Tuner card into the card port on the new motherboard and secure it with the 2 screws. c. Connect the antenna cable(s) to the TV-Tuner card. d. Line up the new motherboard with the chassis and slide it into position.
Step 10. Remove the 8 screws that secure the motherboard to the chassis and slide it out as shown. Step 11. Remove the 4 screws that secure the speaker system to the motherboard. Step 12. Detach the speaker from the chassis. Step 13. To install the new speaker system: a. Attach the new speaker cable to the chassis. b. Line up the motherboard with the chassis and slide it into position.
Replacing the TV tuner card Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the TV tuner card Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step 3. Disconnect all cables attached to the computer.
Step 13. Pull the TV-Tuner card upward to remove it from the card port on the motherboard. Step 14. To install the new TV-Tuner card: a. Insert the notched end of the TV-Tuner card into the card port on the motherboard. b. Secure new the TV-Tuner card to the motherboard with the 2 screws. c. Connect the antenna cable(s) to the new TV-Tuner card. Step 15. Line up motherboard with the chassis and slide it into position.
Step 10. Remove the 8 screws that secure the motherboard to the chassis and slide it out as shown. Step 11. Use a flat head screwdriver as a lever to prise out the battery as shown. Step 12. To install the new battery: a. Insert the new battery (CR2032) into the socket with the side labeled “+” facing up, and press the battery into place. Step 13. Line up the motherboard with the chassis and slide it into position.
Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer. Refer to “Left and right view” and “Rear view” for help with locating the various connectors. Step 4.
Step 8. Reattach the base cover and secure it with the screws. Removing the rear cover Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To remove the rear cover Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating system, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step 3. Disconnect all cables attached to the computer.
Step 7. Put the head of a flat head screwdriver between the middle frame and the rear cover as shown. Then using the screwdriver as a lever and the middle frame metal bar as the fulcrum, prise the rear cover away from the middle frame. 1 Fulcrum 1 Le ve r Step 8. Working around the edge in an anti-clockwise direction, use your fingers to prise up the rear cover. The rear cover is pinned into place, use short, sharp movements to prise it up. 2 2 Step 9.
Step 8. Remove the scalar shielding and set it aside. Step 9. Disconnect all the cables from the scalar board. Step 10. Remove the 5 screws that secure the scalar board to the middle frame and lift it up to remove it. WLAN Ca me ra Conve rte r Touch control S ca la r HDMI/DVI LED/CIR LVDS MMB P owe r Blue tooth Step 11. To install the new scalar board: Chapter 8.
a. Line up the holes on the new scalar board with the mounting holes on the middle frame and secure it with the 5 screws. b. Connect all the cables to the new scalar board. c. Reattach the scalar shielding to the middle frame with the 3 screws. Step 12. Reattach the rear cover to the LED panel. Step 13. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables back to the motherboard. Step 14. Reattach the base cover and secure it with the screws.
a. Line up the holes on the new touch control board with the mounting holes on the middle frame and secure it with the 2 screws. b. Connect all the cables to the new touch control board. Step 11. Reattach the rear cover to the LED panel. Step 12. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables to the motherboard. Step 13. Reattach the base cover and secure it with the screws.
Step 10. To install the new converter board: a. Line up the holes on the new converter board with the mounting holes on the middle frame and secure it with the 4 screws. b. Connect the 2 cables to the new converter board. Step 11. Reattach the rear cover to the LED panel. Step 12. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables to the motherboard. Step 13. Reattach the base cover and secure it with the screws.
Step 8. Remove the screw that secures the power switch board to the LED panel and lift up the power switch board to remove it. Step 9. To install the power switch board: a. Line up the hole on the new power switch board with the mounting hole on the LED panel and secure it with the screw. b. Connect the power cable to the new converter board. Step 10. Reattach the rear cover to the LED panel. Step 11. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables to the motherboard.
Step 6. Remove the rear cover. Refer to “Removing the rear cover”. Step 7. Use a small flat head screwdriver to prise the Bluetooth module away from the socket. 1 2 Step 8. Disconnect the cable from the Bluetooth module. 3 3 2 1 Step 9. To install the new Bluetooth module: a. Connect the cable to the new Bluetooth module. b. Line up the new Bluetooth module with the socket, snap it into position and secure it with the pins. Step 10. Reattach the rear cover to the LED panel. Step 11.
Step 9. Lift up the WLAN card to remove it from the socket. 3 4 1 1 1 2 1 Step 10. To install the new WLAN card: a. Connect the data cable to the new WLAN card. b. Line up the new WLAN card with the socket, snap it into position and secure it with the pins. c. Connect the antenna cable to the new WLAN card. Step 11. Reattach the rear cover to the LED panel. Step 12. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables to the motherboard. Step 13.
Step 8. Lift up the camera 2 and disconnect the data cable from the camera. 3 1 2 1 3 Step 9. To install the new camera: a. Connect the data cable to the new camera. b. Line up the holes in the new camera with the mounting holes on the front bezel and secure it with the 2 screws. Step 10. Reattach the rear cover to the LED panel. Step 11. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables to the motherboard. Step 12. Reattach the base cover and secure it with the screws.
Step 9. Lift up the front function board to remove it from the front bezel. 3 1 2 1 3 Step 10. To install the new front function board: a. Connect the data cable to the new front function board. b. Line up the holes in the new front function board with the mounting holes on the front bezel and secure it with the 2 screws. Step 11. Reattach the rear cover to the LED panel. Step 12. Reattach the hinge to the chassis, and reconnect the touch and LED panel cables to the motherboard. Step 13.
Step 7. Remove the scalar board. Refer to “Replacing the scalar board”. Step 8. Remove the touch control board. Refer to “Replacing the touch control board”. Step 9. Remove the converter board. Refer to “Replacing the converter board ”. Step 10. Remove the power switch board. Refer to “Replacing the power switch board”. Step 11. Remove the Bluetooth module. Refer to “Replacing the Bluetooth module”. Step 12. Remove the WLAN card. Refer to “Replacing the WLAN card”. Step 13.
Step 17. Remove the 6 screws that secure the hinge to the middle frame and set the hinge aside. Step 18. To install the new the LED panel: a. Line up the holes on the hinge with the mounting holes on the new middle frame and secure it with 6 screws. b. Attach all the cables to the new LED panel middle frame and front bezel. c.
4 5 6 7 31 8 30 9 29 28 27 10 11 12 13 26 14 25 15 16 17 18 19 20 24 23 21 22 Item # FRUs Service Part Number (FRU #) CRU ID A720 1G_DDR3 W/HDIN W/TV1 MB 90000165 N A720 2G_DDR3 W/HDIN W/TV1 MB 90000166 N A720 1G_DDR3 W/HDIN W/O TV MB 90000167 N A720 2G_DDR3 W/HDIN W/O TV MB 90000168 N A720 1G_DDR3 W/O HDIN W/O TV1 MB 90000169 N A720 2G_DDR3 W/O HDIN W/O TV1 MB 90000170 N Intel PPT C1 HM76 Chipset 1100364 N Intel I3-3110M 2.
Audio N 73040715 N M471B5773DH0-CK0 1-100226 N HMT325S6CFR8C-PB 1-100227 N MT8KTF25664HZ-1G6M1 1-100228 N Elp_R J2108BDBG-GN-F 2GB D3-1600S MEMORY 1-100425 N M471B5273DH0-CK0 1-100230 N HMT351S6CFR8C-PB 1-100231 N Elp_R J2108BDBG-GN-F 4GB D3-1600S MEMORY 1-100426 N MT16KTF51264HZ-1G6M1 1-100232 N Seagate ST9500325AS 500G 9NB HDD 16-004189 N WD WD5000BPVT-24HXZ 5400RPM 500G HDD 9.5mm 4k sector 16004846 N WD WD5000BPVT-24A1YT0 5400PRM 9.
Power Supply FSP150-RAB 150W adapter® 36-001876 1 Lieton PA-1151-11VA 150w adapter(R) 36-001875 1 A720 CoolMaster DIS 45W Heat Sink 90200583 N A720 AVC DIS 45W Heat Sink 90201255 N A720 Delta DIS 45W Fan 90200584 N A720 AVC DIS 45W Fan 90201256 N A720 Wlan Card W/CABLE 90000171 N A720 Wlan Anntena 90200739 N Avermedia H339BB DVB-T Mini TV Card 11200290 N Avermedia H339BA ATSC Mini TV Card 11200291 N DVB-T ,ATSC Hybrid MC907 11-013387 N YUAN M270B Mini TV Card(R) 11012147 N
Touch control board 29 Mastouch 27" PCT touch panel win8 73041906 N AUO M270HW02 V3 Ultra-slim MVA-LED 18200174 N A720 Mastouch Touch Module 90400015 N A720 3M LCD Touch Module 90400016 N A720 LCD Front Bezel 90200748 N A720 Mastouch MainFrame Stand 90200749 N A720 3M MainFrame Stand 90200750 N A720 TOUCH Cable 90200733 N Liteon SK-8861(TW) S-Silk KB-Silver（WW） 90200539 2 Liteon SK-8861(TH) S-Silk KB-Silver（WW） 90200540 2 Liteon SK-8861(BE) S-Silk KB-Silver（WW） 90200541 2
90200569 2 Liteon SM-8861(WW) Mouse Silver（WW） 90200570 2 Liteon SM-8861 Mouse(MY) Silver（WW） 90200571 2 LiteonSM-8861Mouse(No Battery)Silver（WW） 90200572 2 Liteon SM-8861(JP) Mouse-Silver(WW) 90200781 2 Volex 1.0m C5 US Power Cable 31033858 1 longwell Black Single-end 1.0m SAAPower Cable 31035397 1 Volex 1.0m C5 Austrilian Power Cable 31049500 1 Luxshare 1.0m C5 Austrilian Power Cable 31049520 1 1.
Longwell Black Single-end 1.0m SA C5Power Cable® 31039105 1 Volex 1.
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Chapter 9. General information This chapter provides general information that applies to all computer models covered by this manual. Additional Service Information This chapter provides additional information that the service representative might find helpful. Power management Power management reduces the power consumption of certain components of the computer such as the system power supply, processor, hard disk drives, and some monitors.
