Clearing Cmos Settings - Dell OptiPlex 780 Ultra Small Form Factor Service Manual

1. Follow the procedures in
2. Remove the computer cover.
3. Locate the 2-pin password jumper (PSWD) on the system board, and remove the jumper to clear the password.
See Password Protection.
4. Replace the computer cover.
5. Connect your computer and monitor to electrical outlets, and turn them on.
6. After the Microsoft® Windows® desktop appears on your computer, shut down your computer.
7. Turn off the monitor and disconnect it from the electrical outlet.
8. Disconnect the computer power cable from the electrical outlet, and press the power button to ground the system
board.
9. Open the computer cover.
10. Locate the 2-pin password jumper on the system board and attach the jumper to reenable the password feature.
11. Replace the computer cover.
CAUTION: To connect a network cable, first plug the cable into the network wall jack and then plug it
into the computer.
12. Connect your computer and devices to electrical outlets, and turn them on.
NOTE:
This procedure enables the password feature. When you enter system setup (see
both system and administrator password options appear as Not Set—meaning that the password feature is enabled
but no password is assigned.
13. Assign a new system and/or administrator password.

Clearing CMOS Settings

WARNING: Before working inside your computer, read the safety information that shipped with your
computer. For additional safety best practices information, see the Regulatory Compliance Homepage
at www.dell.com/regulatory_compliance.
1. Follow the procedures in
2. Remove the cover.
3. Reset the current CMOS settings:
a. Locate the password (PSWD) and CMOS (RTCRST) jumpers on the system board (see
b. Remove the password jumper plug from its pins.
c. Place the password jumper plug on the RTCRST pins and wait approximately 5 seconds.
d. Remove the jumper plug from the RTCRST pins and place it back on the password pins.
4. Replace the computer cover.
CAUTION: To connect a network cable, first plug the cable into the network wall jack and then plug it
into the computer.
5. Connect your computer and devices to electrical outlets, and turn them on.
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Working on Your Computer.
Working on Your Computer.
Entering System Setup),
Password Protection).