Configuration
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Clearing the BIOS password
If the user and/or administrator password is lost or forgotten, clear both
passwords by moving the password clear jumper into the clear position.
The BIOS determines if the password clear jumper is in the clear position during
BIOS POST and clears any passwords if necessary. The password clear jumper must
be restored to its original position for the new password to remain set.
Clearing the CMOS
The CMOS clear jumper uses RTCRST# to:
Clear CMOS values
Set the RTC power well configuration bits to default.
To compatible legacy BIOS for user who is used to use legacy BIOS, BIOS provide
the function to restore the default settings of BIOS Setup when CMOS is cleared,
even though UEFI BIOS store BIOS settings to NVRAM.
There are two methods to clear the CMOS:
Clear the CMOS jumper.
Remove the CMOS battery when the system is in
AC OFF
status.
Important: After clearing the CMOS, the BIOS setup default is restored, but the
password that was set by the user is still reserved.
Recovering the BIOS
If the BIOS image is corrupt, a system BIOS update fails, or the system fails
to complete POST, the BIOS must enter recovery mode. In recovery mode, an entire
BIOS image can be refreshed to BIOS flash part.
To recover the BIOS:
1.
Turn off the system power.
2.
Open the chassis.
3.
Move the BIOS recovery jumper from the normal positions 1-2 to the recovery
positions 2-3.
4.
Close the chassis.
5.
Copy the latest BIOS image file (DC1F1XXX.ROM) to a USB drive, XXX is the
revision number. A bootable USB is not required.
6.
Insert the USB drive into the system.
7.
Power up the system.
8.
The system display setup <Recovery> screen displays automatically and flash
update automatically runs.
9.
Select Proceed with flash update. Flash update automatically runs.
10.
Wait until <Program new data> completes, and then press
Enter
to shut down
the system.
If the signature of FV_MAIN area is invalid, the BIOS automatically enters
recovery mode; if this occurs, only perform steps 5 through 10.
After recovery completes, if the recovery jumper forces the BIOS recovery turn
off the system, and then restore the jumper to its normal position.
