Dell Dimension 4550 - Manual (Page 113)

Appendix 113
11 Turn off any attached devices and disconnect them from their
electrical outlets.
NOTICE: To disconnect a network cable, first unplug the cable from your
computer and then unplug it from the network wall jack.
12 Disconnect the computer power cable from the wall outlet, and then
press the power button to ground the system board.
13 Open the computer cover (see page 83).
14 Reconnect the jumper plug to the password jumper (see page 85).
15 Close the computer cover (see page 104).
NOTICE: To connect a network cable, first plug the cable into the network
wall jack and then plug it into the computer.
16 Connect your computer and devices to their electrical outlets, and
turn them on.
17 Reenter the system setup program as described in step 7 and set new
passwords.
Replacing the Battery
CAUTION: Before you begin any of the procedures in this section,
follow the safety instructions on page 9.
A coin-cell battery maintains computer configuration, date, and time
information. The battery can last several years.
If you have to repeatedly reset time and date information after turning on
the computer, replace the battery.
CAUTION: A new battery can explode if it is incorrectly installed.
Replace the 3-V CR2032 battery only with the same or equivalent
type recommended by the manufacturer. Discard used batteries
according to the manufacturer’s instructions.
1 Record all the screens in the system setup program (see page 110) so
that you can restore the correct settings at step 7.
2 Open the computer cover (see page 83).
3 Locate the battery socket labelled BATTERY (see page 85).