Replacing The System Fan Assembly - Lenovo ThinkCentre M79 User Manual

• To complete the installation or replacement, go to "Completing the parts replacement" on page 110.

Replacing the system fan assembly

Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page v.
To replace the system fan assembly, do the following:
1. Remove any media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See "Removing the computer cover" on page 67.
3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 68.
4. Pivot the drive bay assembly upward to gain access to the system fan assembly. See "Accessing the
system board components and drives" on page 70.
5. Remove the hard disk drive for easier access to the system fan assembly. See "Replacing the hard
disk drive" on page 76.
6. Remove the heat sink fan duct. See "Replacing the heat sink and fan assembly" on page 88.
7. Note the cable routing and disconnect the system fan assembly cable from the system fan connector on
the system board. See "Locating parts on the system board" on page 6.
8. The system fan assembly is attached to the chassis by four rubber mounts. Remove the system fan
assembly by cutting the rubber mounts and lifting the system fan assembly out of the chassis.
Note: The new system fan assembly will have four new rubber mounts attached.
Figure 52. Removing the system fan assembly
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ThinkCentre M79 User Guide