Replacing The System Board - Lenovo ThinkCentre Hardware Maintenance Manual

Machine type: 0800, 0852, 0870, 2471, 2557, 3091, 3265, 3373, 3429,3650, 3678, 4285, 5205, and 5248
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9. Disconnect the touch panel control board cable to the system board. Lift the touch panel control
board from the front bezel.
10. Position the new touch panel control board on the front bezel and align the screw holes in the new
power switch module with those in the front bezel.
11. Connect the cable to the new touch panel control board.
12. Install the screws that secure the new touch panel control board to the front bezel.
13. Go to "Completing the parts replacement" on page 108.

Replacing the system board

Attention
Do not open your computer or attempt any repair before reading and understanding the "Important safety
information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy
of the ThinkCentre Safety and Warranty Guide, go to:http://www.lenovo.com/support
This section provides instructions on how to replace the system board.
To replace the power system board, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See "Removing the computer cover" on page 69.
4. Locate the system board in the computer. See "FRU locations" on page 67.
5. Remove the wall mount cover and wall mount to gain access to the system board. See "Removing or
reinstalling the wall mount cover" on page 73 and "Removing or reinstalling the wall mount" on page 74.
6. Remove the rear I/O assembly to gain access to the system board. See "Replacing the rear I/O
assembly" on page 95.
7. Note the locations of all cable connections on the system board and disconnect all cables. See "System
board connectors" on page 68.
8. Remove the heat sink. See "Replacing the heat sink" on page 81.
104
ThinkCentre Hardware Maintenance Manual

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