Page 5 - Contents; iii
Contents Chapter 1. About this manual . . . . . . 1 Important Safety Information . . . . . . . . . . 1 Chapter 2. Safety information . . . . . . 3 General safety . . . . . . . . . . . . . . . . 3 Electrical safety . . . . . . . . . . . . . . . 3 Safety inspection guide . . . . . . . . . . . . 5 Hand...
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iv IdeaCentre A520 All-In-One PCHardware Maintenance Manual
Page 7 - Chapter 1. About this manual; Important Safety Information
Chapter 1. About this manual This manual contains service and reference information for IdeaCentre A520 All-In-One computers listed onthe 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 Inf...
Page 9 - Chapter 2. Safety information; General safety
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 ...
Page 12 - Grounding requirements; DANGER
• 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 a...
Page 13 - • Throw into or immerse in water
To Connect To Disconnect 1. Turn everything OFF. 2. First, attach all cables to devices. 3. Attach signal cables to connectors. 4. Attach power cords to outlet. 5. Turn device ON. 1. Turn everything OFF. 2. First, remove power cords from outlets. 3. Remove signal cables from connectors. 4. Remove al...
Page 15 - Chapter 3. General information; Specifications
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 A520...
Page 17 - Chapter 4. General Checkout
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, orformatting. Data or programs can be overwritten if you select an...
Page 19 - Chapter 5. Using the Setup Utility; Password considerations
Chapter 5. Using the Setup Utility The Setup Utility program is used to view and change the configuration settings of your computer, regardlessof which operating system you are using. However, the operating system settings might override any similarsettings in the Setup Utility program. Starting the...
Page 21 - Enabling or disabling a device
When a Power-On Password is set, you cannot start the Lenovo BIOS Setup Utility program until a validpassword is typed from the keyboard. Setting, changing, or deleting a Power-On Password Note: A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9). To set a Powe...
Page 22 - Selecting a startup device
Onboard Audio Controller Select whether to enable or disable the Onboard Audio Controller . When this feature is set to Disabled all devices connected to the audio connectors (e.g.headphones or a microphone) are disabled and cannotbe used. Onboard Ethernet Controller or LAN Boot Agent Select whether...
Page 23 - Exiting the Lenovo BIOS Setup Utility program
To view or permanently change the configured startup device sequence, 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 Lenovo BIOS Setup Utility program main menu, select the Startup option. 3. Press the E...
Page 25 - Hard disk drive boot error; Power Supply Problems
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 youdecide which FRUs to have available when servicing a computer. ...
Page 26 - POST error codes; Undetermined problems
POST error codes Each time you turn the computer on, it performs a series of tests to check that the system is operatingcorrectly 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 • ...
Page 27 - Chapter 7. Locating connectors, controls and components; Font view
Chapter 7. Locating connectors, controls and components This section provides illustrations to help locate the various connectors, controls and components of thecomputer. Font view The following illustration shows the location of controls and components on the front of the computer. Attention: Be ca...
Page 28 - Left and right view
Left and right view The following illustration shows the location of connectors, controls and components on the left and rightside of the computer. 2 3 4 5 6 7 1 8 1. Air vents 5. Optical drive eject button 2. USB 3.0 connector 6. Optical drive 3. HDMI-in connector (selected models only) 7. Power bu...
Page 29 - Rear view
Rear view The following illustration shows the location of connectors and components on the rear of the computer. 1 2 3 8 7 6 4 5 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. U...
Page 30 - Hardware components
Hardware components The following illustration shows the components that make up your computer. 4 5 6 7 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 8 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 2 1 1. System fan 16. Bluetooth module 2. Scalar board 17. Power switch board 3. Hard disk drive bracket 18. Fro...
Page 31 - Identifying parts on the motherboard
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 thatyou can install later. The following illustration sh...
Page 33 - Chapter 8. Replacing hardware; General information; Pre-disassembly instructions
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 WarrantyGuide, go to the Support Web site at: ht...
Page 34 - Replacing the keyboard and mouse; To replace the keyboard and mouse:; Replacing the power adapter; To replace the power adapter:
Replacing the keyboard and mouse To replace the keyboard and mouse: Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operatingsystem, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step 3. Disconne...
Page 36 - Removing the base cover; To remove the base cover:
Removing the base cover Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover. Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to p...
Page 37 - Replacing the hard disk drive; To replace the hard disk drive:
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 basewith the 7 screws. c. Return the computer to an upright position. Replacing the hard dis...
Page 38 - Replacing a memory module; To replace a memory module:
Step 7. Slide the hard disk drive and rubbers 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. Slide the new hard disk drive into the hard disk drive bay. c....
Page 39 - Replacing the system fan; To replace the system fan:
Step 5. Push out the latches on both sides of the memory socket to release the memory module. Gentlypull the memory module upward to remove it from its socket. Step 6. To install the new memory module: a. Align the new memory module with the memory socket, then insert it and push down onthe top edge...
Page 40 - Replacing the heat-sink
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 up the system fan to remove it. 3 1 2 3 Step 8. To install the new system fan: a. Line up the new system fan with the mounting holes on the heat-sink and...
Page 41 - Replacing the CPU; To replace the CPU
Step 6. Remove the 9 screws that secure the heat-sink to the motherboard. Step 7. Lift up the heat-sink to remove it. Attention: Place the heat-sink upside down on a flat surface to prevent thermal grease from contaminating other components. Step 8. To install the new heat-sink: a. Use an alcohol pa...
Page 43 - Replacing the optical drive; To replace the optical drive:
Step 11. Lower the microprocessor straight down into its socket on the motherboard. 1 Step 12. To secure the microprocessor by turning the CPU lock screw clockwise to lock the CPU into position. 2 3 2 3 1 Step 13. Use a thermal grease syringe to place 5 drops of grease on the top of the microprocess...
Page 45 - Replacing the solid state disk; To replace the solid state disk:
Step 8. Use a small flat head screwdriver to press and push out the pins that secure the cover to thedrive. 1 2 Step 9. Separate the cover from the defective optical drive. Step 10. Install the new optical drive as follows: a. Align the new optical drive with the cover, and then attach the cover to ...
Page 46 - Replacing the motherboard; To replace the motherboard:
Step 5. Remove the 2 screws that secure the solid state disk to the motherboard. Step 6. Pull the solid state disk upward to remove it from the card port. Step 7. To install the new solid state disk: a. Insert the notched end of the new solid state disk into the card port on the motherboard. b. Secu...
Page 49 - Replacing the speaker system; To replace the speaker system:
Replacing the speaker system Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover. To replace the speaker system: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operatingsystem, and turn off the computer a...
Page 50 - Replacing the TV tuner card; To replace the TV tuner card:
Step 12. Detach the speakers 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. Align the holes on themotherboard with the mounting holes on the chassis and secure it to...
Page 52 - Replacing the battery; To replace the battery:
Replacing the battery Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover. To replace the battery: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operatingsystem, and turn off the computer and all attache...
Page 53 - Removing the hinge from the chassis; To remove the hinge from the chassis:
Step 12. Use a flat head screwdriver as a lever to prise out the battery as shown. Step 13. To install the new battery: a. Insert the new battery (CR2032) into the socket with the side labeled “+” facing up, and pressthe battery into place. Step 14. Line up the motherboard with the chassis and slide...
Page 55 - Removing the rear cover; To remove the rear cover:
Removing the rear cover Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover. To remove the rear cover: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operatingsystem, and turn off the computer and all att...
Page 56 - Replacing the scalar board; To replace the scalar board:
a. Raise the hinge, line up the rear cover with the LED panel and slide it back into position. b. Press the edge of rear cover to lock the cover to the LED panel with the pins. c. Slide the rear deco back into position. Step 11. Reattach the hinge to the chassis, and reconnect the scalar headphone i...
Page 57 - Replacing the touch control board; To replace the touch control board:
Step 10. Reattach the rear cover to the LED panel. Step 11. Reattach the hinge to the chassis, and reconnect the scalar headphone input, scalar and DVI/HDMI cables to the motherboard. Step 12. Reattach the base cover and secure it with the screws. Replacing the touch control board Note: Turn off the...
Page 58 - Replacing the converter board; To replace the converter board:
c. Line up the new touch control board with the mounting marks on the middle frame, thenstick it to the middle frame. Step 10. Reattach the rear cover to the LED panel. Step 11. Reattach the hinge to the chassis, and reconnect the scalar headphone input, scalar and DVI/HDMI cables to the motherboard...
Page 59 - Replacing the power switch board; To replace the power switch board:
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 frameand 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 ...
Page 60 - Replacing the Bluetooth module; To replace the Bluetooth module:
a. Line up the hole on the new power switch board with the mounting hole on the LED panel andsecure 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 scalar headph...
Page 61 - Replacing the Wi-Fi card
Step 11. Reattach the hinge to the chassis, and reconnect the scalar headphone input, scalar and DVI/HDMI cables to the motherboard. Step 12. Reattach the base cover and secure it with the screws. Replacing the Wi-Fi card Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before...
Page 62 - Replacing the camera; To replace the camera:; Replacing the front function board
Replacing the camera Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover. To replace the camera: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operatingsystem, and turn off the computer and all attached ...
Page 63 - To replace the front function board:; Replacing the LED panel
To replace the front function board: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operatingsystem, 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 ...
Page 64 - To replace the LED panel:
Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratchesor other damage. To replace the LED panel: Step 1. Remove any media (disks, CDs, DVDs, ...
Page 65 - FRU lists
Step 16. Remove all the cables attached to the middle frame and the front bezel. Step 17. Remove the 5 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 fram...
Page 73 - Chapter 9. General information; Additional Service Information; Power management
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 reduc...
