Asus P4P800 - Manual (Page 80)

4-6 Chapter 4: BIOS Setup
To recover the BIOS from the support CD:
1. Boot the system.
2. When a corrupted BIOS is detected, the following screen message
appears.
Bad BIOS checksum. Starting BIOS recovery...
Checking for floppy...
3. Place the support CD in the CD-ROM. The support CD contains the
original BIOS for this motherboard.
4. When the BIOS update process is complete, reboot the system.
Bad BIOS checksum. Starting BIOS recovery...
Checking for floppy...
Floppy not found!
Checking for CD-ROM...
CD-ROM found.
Reading file “P4P800.rom”. Completed.
Start flashing...
The recovered BIOS may not be the latest BIOS version for this
motherboard. Visit ASUS website (www.asus.com) to download the
latest BIOS file.
DO NOT shutdown or reset the system while updating the BIOS! Doing
so may cause system boot failure!
If there is no floppy disk found in the drive, the system automatically
checks the CD-ROM.