Replacing The Cover Presence Switch - Lenovo ThinkCentre M73p Hardware Maintenance Manual

6. Pull on the tips of the rubber mounts until the rear fan is secured in place.
Figure 24. Installing the rear fan
7. Connect the rear fan cable to the system fan connector on the system board.
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 126.

Replacing the cover presence switch

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 cover presence switch, do the following:
1. Remove any media from the drives and turn off all connected 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 90.
3. Disconnect the cover presence switch cable from the cover presence switch connector on the system
board. See "Parts on the system board" on page 34.
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ThinkCentre M73p Hardware Maintenance Manual