Dell Dimension 4500S - Manual (Page 80)

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CAUTION: Before you begin any of the procedures in this section,
follow the safety instructions on page 7.
If you forget your user or setup password, you cannot operate your computer
or change settings in the system setup program until you clear the forgotten
password(s).
NOTICE: This process erases both the system and setup passwords.
1 Shut down the computer (see page 22).
2 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.
3 Disconnect the computer power cable from the wall outlet, and then
press the power button to ground the system board.
4 Remove the computer stand, if it is attached (see page 17).
5 Open the computer cover (see page 62).
6 Locate jumper PSWD on the system board (see page 65) and remove
the jumper plug.
7 Close the computer cover (see page 72), plug your computer into an
electrical outlet, and turn on the computer.
The existing password(s) will be erased.
8 Shut down the computer (see page 22).
9 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.
10 Disconnect the computer power cable from the wall outlet, and then
press the power button to ground the system board.
11 Open the computer cover (see page 62).
12 Reconnect the jumper plug to jumper PSWD (see page 65).
13 Close the computer cover (see page 72).