Dell E521 specifications Clearing Cmos Settings, Flashing the Bios

3.Locate the 2-pin password jumper (PSWD) on the system board (see System Board Components), and remove the jumper to clear the password.

NOTE: When you receive your computer, the jumper plug is attached to pins 1 and 2.

4.Replace the computer cover (see Installing the Computer Cover).

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 Turning Off Your Computer).

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 Removing the Computer Cover).

10.Locate the 2-pin password jumper (PSWD) on the system board (see System Board Components) and attach the jumper to pins 1 and 2 to re-enable the password feature.

11.Replace the computer cover (see Installing the Computer Cover).

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 Computer.

2.Remove the computer cover (see Removing the Computer Cover).

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 System Board Components).

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 Installing the Computer Cover).

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.