Replacing the system fan 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, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the system fan assembly.
To replace the system fan assembly:
1. Remove cover. See “Removing the computer cover” on page 117.
2. Remove the drive bay assembly. See “Accessing the system board components
and drives” on page 119.
3. Remove the hard disk drive. See “Replacing the hard disk drive” on page 132.
4. Disconnect the system fan cable from the system board. See “Locating parts
on the system board” on page 119.
5. Remove the two screws securing the system fan assembly.
6. Remove the system fan assembly by pulling the bracket outward and lifting it
up from the system board to remove completely.
7. Install the new system fan assembly and install the two screws that secure the
fan assembly.
8. Connect the system fan cable to the system fan connector on the system
board.
9. Reinstall the hard disk drive. See “Replacing the hard disk drive” on page
132.
10. Align the drive bay assembly with the two slots and rails on the sides of the
chassis and slide the drive bay assembly towards the rear of the chassis until
it snaps into position.
11. Reinstall the front bezel.
12. Go to “Completing the FRU replacement” on page 140.
138 Hardware Maintenance Manual
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