24 Chapter 2
BIOS Flash Utility
The BIOS flash memory update is required under the following conditions:
TWhen there are new versions of system programs
TWhen new hardware options are installed
TWhen the BIOS has been corrupted and you need to re store it
BIOS Flash Precautions
TIf you do not have a crisis recovery diskette at hand, create a Crisis Recovery Diskette in Windows XP
of Vista before you use the flash utility.
TDo not install memory-related drivers (XMS, EMS, DPMI) when you use the flash utility.
TPlace the computer in AC mode during the BIOS flash procedure. If the battery pack does not contain
enough power to finish the BIOS flash, you may not able to boot the system because the BIOS is not
completely loaded.
To flash the BIOS:
1. Prepare a bootable diskette.
2. Copy the flash utilities to the bootable diskette.
3. Boot the system from the bootable diskette.
The flash utility will automatically be executed.
4. Follow the on-screen instructions to finish th e flashing of the BIOS.
BIOS Recovery
If a BIOS flash procedure fails to complete, perform a BIOS recovery procedure by using the Crisis Recovery
Diskette. During this procedure, the system will force the BIOS to enter a special BIOS block, called boot
block, to boot up the system with minimum BIOS initialization.
To perform BIOS recovery:
1. Make sure the power cord is connected to the computer.
1. Attach ed a USB flopp y dri ve to th e co mp ut er.
2. Insert the Crisis Recovery Diskette into the floppy drive.
3. Press and hold the Fn+Esc keys, then press the power button .
This initialize the BIOS recovery process. The boot block BIOS will start to restore the failed BIOS code.
Short beeps should be heard during this process. Once the process is completed, a long beep should be
heard.
4. Turn off the computer once the process is complete.
5. Turn on the computer again and flash the BIOS. Refer to the previous instructions.
Acer TM 4520 SG.book Page 24 Friday, June 22, 2007 5:43 PM