Replacing The Cover Presence Switch - Lenovo ThinkCentre M73 10B0 Hardware Maintenance Manual

9. Secure the cable of the new internal speaker in the retaining clip on the side of the thermal module
bracket.
Figure 196. Securing the internal speaker cable
10. Connect the cable of the new internal speaker to the internal speaker connector on the system board.
See "Locating parts on the system board" on page 87.
11. Reinstall the hard disk drive assembly. See "Installing or removing the hard disk drive assembly" on
page 209.
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 235.

Replacing the cover presence switch

Attention: Do not open your computer or attempt any repair before reading and understanding the
"Important safety information" on page 1.
This section provides instructions on how to replace the cover presence switch (also known as intrusion
switch).
To replace the cover presence switch, do the following:
1. Remove all 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 207.
3. Locate the cover presence switch in the computer. See "Locating major FRUs and CRUs" on page 85.
4. Disconnect the cover presence switch cable from the system board.
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Chapter 11 Replacing FRUs (machine types: 10AX, 10AY, 10DK, 10DL, 10DM, and 10DN)
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