Dell Precision 350 - Manual (Page 15)

S e t u p a n d Q u i c k Re f e r e n c e G u i d e 15
3 At the Dell Support website home page, click Reference, click User’s
Guides, click Systems, and then select your Dell Precision computer.
Opening the Computer Cover
CAUTION: Before you begin any of the procedures in this section,
follow the safety instructions in the System Information Guide.
1 Shut down the computer through the Start menu.
2 Ensure that your computer and attached devices are turned off. If your
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.
3 Disconnect any telephone or telecommunication lines from the
computer.
4 Disconnect your computer and all attached devices from electrical
outlets, and then press the power button to ground the system board.
5 If you have installed a padlock through the padlock ring on the back
panel, remove the padlock.
CAUTION: To guard against electrical shock, always unplug your
computer from the electrical outlet before opening the cover.
6 Lay the computer on its side as shown in the illustration.
NOTICE: Ensure that sufficient space exists to support the open cover—at
least 30 cm (1 ft) of desk top space.
7 Open the computer cover:
a Facing the back of the computer, press the release button on the
right side of the computer with one hand while pulling up on the
top of the cover with the other hand.
b Press the release button on the left side of the computer with one
hand while pulling up on the top of the cover with the other hand.
c Hold the bottom of the computer with one hand, and then pull
open the cover with the other hand.