4-4 Installing Options
System Unit Covers
The following sections describe how to remove and replace the system
unit cover and the front panel. Remove the cover to access the interior of
the system. See “Removing the Cover.” Remove the front panel to install
or replace a 3 1/2-inch accessible device, a 5 1/4-inch accessible device,
or a 3 1/2-inch internal device. See “Removing the Front Panel” later in
this chapter.
The chassis shell (the U-shaped metal covering with rubber feet on two
sides) should only be removed by authorized service personnel. The parts
that are accessed from this panel must be removed or repaired by
authorized service personnel only.
Removing the Cover
Before installing optional hardware inside your system, you must first
remove the cover from the system unit.
Before removing the cover, turn off system
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 any external options (such as a keyboard and monitor)
from the front or rear of the system unit.
Electrostatic discharge can damage computer
components. Discharge static electricity by touching a metal object before
removing the cover.
3.
If the system unit is in the upright (minitower) position, place it on its
right side (the side with four rubber feet).
4.
If you have a padlock in the locking tab on the rear of the chassis,
remove it.
5.
Remove the two thumbscrews holding the cover to the rear of the
chassis (see the following figure).