Before you begin any of the procedures in this section,
follow the safety instructions listed in "When Working Inside Your
Computer" on page 12.
To guard against electrical shock, always unplug your
computer from the electrical outlet before opening the cover.
Shut down the computer (see page 22).
Turn off any attached devices and disconnect them from their
To disconnect a network cable, first unplug the cable from your
computer and then unplug it from the network wall jack.
Disconnect the computer power cable from the wall outlet, and then
press the power button to ground the system board.
switch (see page 9 for
Adding Pa rts