Replacing The System Board - Lenovo ThinkCentre 3512 Manual

10. Route the new integrated camera cable, and then connect the integrated camera cable to the system
board. See "System board parts and connectors" on page 72.
11. Reinstall the system board shield. See "Removing and reinstalling the system board shield" on page 88.
12. Go to "Completing the parts replacement" on page 111.

Replacing the system board

Attention
Do not open your computer or attempt any repair before reading and understanding the "Important safety
information" in the Safety , Warranty, and Setup Guide that came with your computer. To obtain a copy of
the Safety , Warranty, and Setup Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the system board.
To replace the 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 other flat 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 81.
4. Remove the system board shield. See "Removing and reinstalling the system board shield" on page 88.
5. Locate the system board in the computer. See "Locating major FRUs and CRUs" on page 68.
6. Remove the heat sink assembly. See "Replacing the heat sink assembly" on page 91.
7. Remove the microprocessor. See "Replacing the microprocessor" on page 93.
8. Remove the memory modules. See "Installing or replacing a memory module" on page 100.
9. Remove the battery. See "Replacing the battery" on page 98.
10. Remove the rear I/O assembly to gain access to the system board. See "Replacing the rear I/O
assembly" on page 86.
11. Note the locations of all cable connections on the system board and disconnect all cables. See "System
board parts and connectors" on page 72.
12. Remove the seven screws that secure the system board to the main bracket. Carefully lift the system
board out of the chassis.
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ThinkCentre Hardware Maintenance Manual