10. To secure the microprocessor in the socket, close the microprocessor retainer
and lock it into position with the small handle.
11. Install the heat sink on the system board. See “Replacing the heat sink” on
page 16.
12. Go to Chapter 4, “Completing the parts replacement,” on page 31.
Replacing the system fan assembly
Attention
Do not open your computer or attempt any repair before reading 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 fan assembly.
Note:
When you receive your new system fan assembly, you will receive new
rubber mounts.
1. Open the computer cover. See “Opening the cover” on page 11.
2. Locate the fan connector. See “Identifying parts on the system board” on page
9.
3. Disconnect the system fan assembly cable from the system board. See
“Identifying parts on the system board” on page 9.
4. You have to remove the heat sink to gain access to the system fan assembly.
See “Replacing the heat sink” on page 16.
5. Locate the two rubber mounts on the system fan assembly that attach to the
chassis. Carefully remove these rubber mounts from the rear of the chassis by
breaking them or cutting them with scissors.
6. Lift the system fan assembly out of the chassis.
7. When installing your new system fan assembly, use the new rubber mounts
that come with the new fan.
Figure 15. Removing the system fan assembly
Chapter 3. Installing options and replacing hardware 19
