System Unit Cover Removal; Removing The Side Covers - NEC PowerMate Professional 9000E Series Service Manual

When disassembling the system unit, follow these general rules.
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Before opening the system or handling boards or chips, touch the frame
to discharge static.
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Disconnect all peripherals before disassembling the system unit.
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Do not disassemble parts other than those specified in the procedure.
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All screws are Phillips-head, unless otherwise specified.
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Label any connector before removing it. Note where the connector goes
and in what position it was installed.
On completion of any reassembly, perform a power-on test. If a fault occurs,
verify that the reassembly was performed correctly.
Before handling boards or chips, ground yourself to release
static.

System Unit Cover Removal

The following sections describe how to remove and replace the system unit side
covers and top cover.

Removing the Side Covers

Before installing optional hardware inside your computer, you must first remove
one or both of the side covers on the system unit. The left side cover must be
removed whenever the interior of the system unit is accessed. Less frequently,
the right side cover must be removed. The following procedure applies to either
cover.
Before you remove a 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 attached device
(such as speakers or a printer) from the rear of the system unit.
! CAUTION
!
WARNING
Disassembly and Reassembly 3-3