Opening The Computer Cover - Dell Precision 450 Guide De Configuration Et De Référence Rapide

44
Setup and Quick Re ference Guide

Opening the Computer Cover

. CAUTION: Before you begin any of the procedures in this
section, follow the safety instructions in the System Information
Guide.
Shut down the computer through the Start menu.
1
Ensure that your computer and attached devices are turned off. If your
2
computer and attached devices did not automatically turn off when
you shut down your computer, turn them off now.
NOTICE: To disconnect a network cable, first unplug the cable from your
computer and then unplug it from the network wall jack.
Disconnect any telephone or telecommunication lines from the
3
computer.
Disconnect your computer and all attached devices from electrical
4
outlets, and then press the power button to ground the system board.
If you have installed a padlock through the padlock ring on the back
5
panel, remove the padlock.
CAUTION: To guard against electrical shock, always unplug your
computer from the electrical outlet before opening the cover.
Lay the computer on its side as shown in the illustration.
6
NOTICE: Ensure that sufficient space exists to support the open cover—at
least 30 am (1 ft) of desktop space.
Open the computer cover:
7
Slide the cover release latch toward the top of the computer.
a
b Raise the cover, and pivot it toward the front of the computer.
Ground yourself by touching an unpainted metal surface on the
8
computer, such as the metal at the back of computer, before touching
anything inside your computer.
While you work, periodically touch any unpainted metal surface on
the computer to dissipate any static electricity that could harm
internal components.