Internal Access; Removing The System Unit Top Cover - NEC POWERMATE ENTERPRISE NETPC Service Manual

3-4 Option Installation

Internal Access

The following sections describe how to remove the system unit cover, open and close the
chassis, and replace the system unit cover.

Removing the System Unit Top Cover

Before installing optional hardware inside the computer, first remove the system unit top
cover.
1. Turn off and unplug the system.
Disconnect the keyboard, mouse, monitor, LAN, and any other external options
2.
(such as speakers or a printer) from the rear of the system unit.
Place the computer in the desktop (horizontal) position. Holding the rear corners
3.
of the top cover, lift up and slide the cover toward the front as shown in the
following figure.
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.
CAUTION: Electrostatic discharge can damage
computer components. Discharge static
electricity by touching a metal object before
removing the system unit cover.