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Clearing CMOS Settings
1.
2.
Remove the computer cover (see
).
3.
Locate the 3-pin CMOS jumper (CLEAR_CMOS) on the system board (see
).
4.
Remove the jumper plug from the CMOS jumper (CLEAR_CMOS) pins 1 and 2.
5.
Place the jumper plug on the CMOS jumper (CLEAR_CMOS) pins 2 and 3 and wait approximately five seconds.
6.
Remove the jumper plug and replace it on the CMOS jumper (CLEAR_CMOS) pins 1 and 2.
7.
Replace the computer cover (see
8.
Connect your computer and devices to electrical outlets, and 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 the Dell Support website at
support.dell.com
.
3.
Click
Download Now
to download the file.
4.
If the
Export Compliance Disclaimer
window appears, click
Yes, I Accept this Agreement
.
The
File Download
window appears.
5.
Click
Save this program to disk
, and then click
OK
.
The
Save In
window appears.
6.
Click the down arrow to view the
Save In
menu, select
Desktop
, and then click
Save
.
The file downloads to your desktop.
7.
Click
Close
when the
Download Complete
window appears.
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions located that shipped with your computer.
CAUTION:
The computer must be disconnected from the electrical outlet to clear the CMOS setting.
NOTE:
For non U.S. regions, choose your country/region from the drop-down list at the bottom of the Dell support website and then locate the
BIOS update file for your computer.