86 Installing System Components
8
Reinstall the hard drive. See "Installing a Hard Drive in the Rotatable Carrier" on page50.
9
Connect the card fan cable from the FAN_MEM connector on the system board. See
Figure6-2
.
10 Rotate the hard-drive carrier back into the system. See
"Rotating the Hard-Drive Carrier Into the
System" on page46
.
11
Close the system. See "Closing the System" on page43.

Replacing the Fourth Hard-Drive Fan

The fourth hard-drive fan is integrated in the optional fourth hard-drive carrier and is replaced as part of
the carrier assembly. See "Removing an Optional Fourth Hard Drive" on page58.
Chassis Intrusion Switch

Removing the Chassis Intrusion Switch

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the
components inside the system. Before performing any procedure, see your Product Information Guide for
complete information about safety precautions, working inside the computer and protecting against electrostatic
discharge.
1
Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
2
Open the system. See "Opening the System" on page 43.
3
Disconnect the chassis intrusion switch cable from the INTRUDER connector on the system board.
See Figure3-28.
4
Slide the chassis intrusion switch out of the securing bracket notch. See Figure3-28.
5
Remove the switch and its attached cable from the system.
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