Lenovo ThinkCentre M79 Hardware Maintenance Manual page 147

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 108.
5. Remove the hard disk drive for easier access to the system fan assembly. See "Replacing the hard
disk drive" on page 114.
6. Remove the heat sink fan duct. See "Replacing the heat sink and fan assembly" on page 126.
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 34.
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 55. Removing the system fan assembly
.
Chapter 11 Installing or replacing hardware
139