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a. Disconnect the cover presence switch cable from the cover presence switch connector on the
system board. See "Parts on the system board" on page 6.
b. Remove the screw that secures the cover presence switch and remove the cover presence switch
from the chassis.
Figure 80. Removing the cover presence switch
4. To install the cover presence switch, do the following:
a. Align the screw hole in the cover presence switch with the corresponding hole in the chassis. Then
install the screw to secure the cover presence switch to the chassis.
Figure 81. Installing the cover presence switch
b. Connect the cover presence switch cable to the cover presence switch connector on the system
board. See "Parts on the system board" on page 6.
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 108.
Power supply assembly
Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page iii.
Although there are no moving parts in your computer after the power cord has been disconnected, the
following warnings are required for your safety and proper Underwriters Laboratories (UL) certification.
CAUTION:
94
P520c User Guide
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