Dell Vostro 400 (Mid 2007) - Manual (Page 103)

Removing and Installing Parts
103
NOTICE:
To disconnect a network cable, first unplug the cable from your computer
and then unplug the cable from the network device.
1 Disconnect all telephone or network cables from the computer.
2 Disconnect your computer and all attached devices from their electrical
outlets.
3 Press the power button to ground the system board.
CAUTION:
To guard against electrical shock, always unplug your computer from
the electrical outlet before opening the cover.
4 Open the computer cover.
NOTICE:
Before touching anything inside your computer, ground yourself by
touching an unpainted metal surface, such as the metal at the back of the computer.
While you work, periodically touch an unpainted metal surface to dissipate static
electricity, which could harm internal components.
Removing the Computer Cover
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the Product Information Guide.
CAUTION:
To guard against electrical shock, always unplug your computer from
the electrical outlet before removing the cover.
1 Follow the procedures in "Before You Begin" on page 101.
NOTICE:
Ensure that sufficient space exists to support the removed cover.
NOTICE:
Ensure that you are working on a level, protected surface to avoid
scratching either the computer or the surface on which it is resting.
2 Lay your computer on its side with the computer cover facing up.
3 Remove the two screws securing the cover.