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d. Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be
kept as clean as possible.
Figure 24. 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 and fan assembly” on page 44.
12. Reinstall any other parts or reconnect any other cables you removed.
13. Go to “Completing the parts replacement” on page 57.
Replacing the system board
Attention
Do not open your server or attempt any repair before reading and understanding the Chapter 1 “About this
manual” on page 1 and the Safety Information book. To obtain a copy of the Safety Information book,
go to:http://www.lenovo.com/support
This section provides instructions on how to replace the system board.
CAUTION:
The heat sink and microprocessor might be very hot. Turn off the server and wait three
to ve minutes to let the server cool before removing the server cover.
Note: When replacing the system board, you must order a new retention module for the new system board.
Make sure you have a retention module for the new system board before continuing this procedure.
To replace the system board, do the following:
1. Remove all media from the drives and turn off all attached devices and the server. Then, disconnect all
power cords from electrical outlets and disconnect all cables that are connected to the server.
2. Remove the server cover. See “Removing the server cover” on page 30.
3. Lay the server on its side for easier access to the system board.
Chapter 6. Replacing FRUs 47