Dell Vostro 220 (Late 2008) - Manual (Page 36)

36
Working on Your Computer
NOTICE:
When you disconnect a cable, pull on its connector or on its pull-tab, not
on the cable itself. Some cables have connectors with locking tabs; if you are
disconnecting this type of cable, press in on the locking tabs before you disconnect
the cable. As you pull connectors apart, keep them evenly aligned to avoid bending
any connector pins. Also, before you connect a cable, ensure that both connectors
are correctly oriented and aligned.
NOTICE:
To avoid damaging the computer, perform the following steps before you
begin working inside the computer.
1 Ensure that the work surface is flat and clean to prevent the computer
cover from being scratched.
2 Turn off your computer (see "Turning Off Your Computer" on page 36).
NOTICE:
To disconnect a network cable, first unplug the cable from your computer
and then unplug the cable from the network device.
3 Disconnect all telephone or network cables from the computer.
4 Disconnect your computer and all attached devices from their electrical
outlets.
5 Press and hold the power button while the system is unplugged to ground
the system board.
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.
Turning Off Your Computer
NOTICE:
To avoid losing data, save and close all open files and exit all open
programs before you turn off your computer.
1 Shut down the operating system.
2 Ensure that the computer and all attached devices are turned off. If your
computer and attached devices did not automatically turn off when you
shut down your operating system, press and hold the power button for
about 4 seconds to turn them off.