Dell OptiPlex 330 User Manual page 145

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 Turn off your computer (see "Turning Off Your Computer" on page 143).
CAUTION:
Never apply power to the computer when the cover has been removed.
NOTICE:
To disconnect a network cable, first unplug the cable from your computer
and then unplug the cable from the network device.
CAUTION:
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.
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.
Adding and Replacing Parts
145