Replacing The System Board - Lenovo ThinkCentre Hardware Maintenance Manual

c. Touch only the sides of the microprocessor. Do not touch the gold contacts on the bottom.
d. Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be
kept as clean as possible.
Figure 13. Removing the microprocessor
7. Make sure that the small handle is in the raised position and the microprocessor retainer is fully open.
8. Hold the new microprocessor and align the notches on it with the alignment keys in the microprocessor
socket, or align the small triangle on one corner of the new microprocessor with the corresponding
beveled corner of the microprocessor socket.
9. Lower the new microprocessor straight down into the microprocessor socket on the system board.
10. Close the microprocessor retainer and lock it into position with the small handle to secure the new
microprocessor in the socket.
11. Reinstall the heat sink and fan assembly. See "Replacing the heat sink" on page 73.
12. Reinstall any other parts or reconnect any other cables you removed.
13. Go to "Completing the parts replacement" on page 87.

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.
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ThinkCentre Hardware Maintenance Manual