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84 Adding Parts
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Opening the Computer Cover
CAUTION: Before you begin any of the procedures in this section,
follow the steps listed in the safety instructions on page 12
CAUTION: To guard against electrical shock, always unplug your
computer from the electrical outlet before opening the cover.
1
Shut down the computer (see page 33).
NOTICE: To disconnect a network cable, first unplug the cable from your
computer and then unplug it from the network wall jack.
2
Turn off any attached devices and disconnect them from their
electrical outlets.
3 Disconnect the computer power cable from the wall outlet, and then
press the power button to ground the system board.
NOTICE: Ensure that sufficient space exists to support the open cover—at
least 30 cm (1 ft) of desk top space.
4
Lay the computer on its side so that the arrow on the bottom of the
computer points up.
5 Open the 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.