3-4 Option Installation
Removing the System Unit Cover
Remove the system unit cover by following these steps:
WARNING:
Before removing the system unit
cover, turn off the power and unplug the system
power cable. Power is removed only when the
power cable is unplugged.
1.
Turn off and unplug the system unit.
2.
Disconnect the keyboard, mouse, monitor, and any other device (such as a
printer) connected to the back of the system.
CAUTION:
Electrostatic discharge can damage
computer components. Discharge static
electricity by touching a metal object before you
remove the system unit cover.
3.
If a cover lock is being used, unlock it and remove it from the system unit.
4.
Loosen the two cover thumb screws on the back of the system unit (see
Figure 3-2).
Figure 3-2 Loosening Cover Screws