Lenovo ThinkCentre M79, Hardware Maintenance Manual

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9. Install the new system fan assembly by aligning the new rubber mounts that came with the new system
fan assembly with the corresponding holes in the chassis, and then push the rubber mounts through the
holes. Then, carefully pull on the tips of the rubber mounts from the bottom until the new system fan
assembly is secured in place.
Figure 56. Installing the system fan assembly
10. Connect the new system fan assembly cable to the system fan connector on the system board. See
“Locating parts on the system board” on page 34.
11. Reinstall the heat sink fan duct. See “Replacing the heat sink and fan assembly” on page 126.
12. Reinstall the hard disk drive. See “Replacing the hard disk drive” on page 114.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 151.
Replacing the thermal sensor
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 “Read this first: Important safety information” on page 1.
To replace the thermal sensor, 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 105.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 106.
4. Locate the thermal sensor. See “Locating components” on page 31.
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ThinkCentre M79 Hardware Maintenance Manual