Clearing Cmos Settings; Flashing The Bios - Dell Dimension E521 Service Manual

3. Locate the 2-pin password jumper (PSWD) on the system board (see
NOTE: When you receive your computer, the jumper plug is attached to pins 1 and 2.
4. Replace the computer cover (see
5. Connect your computer and monitor to electrical outlets, and then turn them on.
6. After the Microsoft® Windows® desktop appears on your computer, shut down the computer (see
7. Turn off the monitor and disconnect it from the electrical outlet.
8. Disconnect the computer power cable from the electrical outlet, then press the power button to ground the system board.
9. Remove the computer cover (see
10. Locate the 2-pin password jumper (PSWD) on the system board (see
the password feature.
11. Replace the computer cover (see
NOTICE: To connect a network cable, first plug the cable into the network device and then plug it into the computer.
12. Connect your computer and devices to electrical outlets, and then turn them on.
Clearing CMOS Settings
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
1. Follow the procedures in Before Working Inside Your
2. Remove the computer cover (see
NOTE: The computer must be disconnected from the electrical outlet to clear the CMOS setting.
3. Reset the current CMOS settings:
a. Locate the 2-pin CMOS jumper (RTCRST) on the system board (see
NOTE: When you receive your computer, there is no jumper plug on the CMOS jumper.
b. Remove the jumper plug from the password jumper (PSWD) pins 1 and 2.
c. Place the jumper plug on the CMOS jumper (RTCRST) pins 1 and 2 and wait approximately five seconds.
d. Remove the jumper plug and replace it on the password jumper (PSWD) pins 1 and 2.
4. Replace the computer cover (see
NOTICE: 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 then turn them on.
Flashing the BIOS
The BIOS may require flashing when an update is available or when replacing the system board.
1. Turn on the computer.
2. Locate the BIOS update file for your computer at support.dell.com.
3. Click Download Now to download the file.
Installing the Computer Cover).
Removing the Computer Cover).
Installing the Computer Cover).
Computer.
Removing the Computer Cover).
Installing the Computer Cover).
System Board Components), and remove the jumper to clear the password.
Turning Off Your
System Board Components) and attach the jumper to pins 1 and 2 to re-enable
System Board Components).
Computer).