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8. Remove the new microprocessor 1 from the protective cover 2 that
protects the gold contacts on the bottom of the new microprocessor.
9. Hold the new microprocessor by the edges and align the notches on it with
the tabs in the microprocessor socket, or align the small triangle on one corner
of the microprocessor with the corresponding beveled corner of the
microprocessor socket.
10. Lower the new microprocessor straight down into the microprocessor socket
on the system board.
11. Close the microprocessor retainer and lock it into position with the small
handle to secure the new microprocessor in the socket.
12. Reinstall the heat sink and fan assembly. See “Replacing the heat sink and fan
assembly” on page 24.
What to do next:
v To work with another piece of hardware, go to the appropriate section.
v To complete the replacement, go to “Completing the parts replacement” on
page 46.
Replacing the power supply assembly
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,goto:
http://www.lenovo.com/support
This section provides instructions on how to replace the power supply assembly.
Although there are no moving parts in your computer after the power cord has
been disconnected, the following warnings are required for your safety and proper
Underwriters Laboratories (UL) certification.
Chapter 2. Installing or replacing hardware 29