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5-2 Repair
When disassembling the system unit, follow these general rules.
Disconnect all peripherals.
When handling boards or chips, touch the system unit frame to discharge static
electricity.
Do not disassemble parts other than those specified in the procedure.
All screws are Phillips-head, unless otherwise specified.
Label all removed connectors. Note where the connector goes and in what
position it was installed.
On completion of any reassembly, perform a power-on test (see Section 2, “Setup and
Operation”). If a fault occurs, verify that the reassembly was performed correctly.
CAUTION:
When handling boards or chips,
ground yourself to release static electricity.
System Unit Cover Removal
Remove the system unit cover as follows:
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 devices (such as a
printer) connected to the rear of the system.
Label all cables to make reinstallation easier.
CAUTION:
Electrostatic discharge can damage
computer components. Discharge static
electricity by touching a metal object before you
remove the system unit cover.
3.
Remove the three thumb screws from the rear of the system unit (see Figure 5-1).
If you have installed a padlock on the back of the system, unlock the padlock and
remove it.
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