Acer Extensa 4120 Service Manual

Also see for Extensa 4120: User guide

Contents

Acer Extensa 4120 Service Manual Manual pdf 34 page image

24 Chapter 2BIOS Flash UtilityThe BIOS flash memory update is required under the following conditions:T When there are new versions of system programsT When new hardware options are installedT When the BIOS has been corrupted and you need to restore itBIOS Flash PrecautionsT If you do not have a crisis recovery diskette at hand, create a Crisis Recovery Diskette in Windows XPof Vista before you use the flash utility.T Do not install memory-related drivers (XMS, EMS, DPMI) when you use the flash utility.T Place the computer in AC mode during the BIOS flash procedure. If the battery pack does not containenough power to finish the BIOS flash, you may not able to boot the system because the BIOS is notcompletely 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 the flashing of the BIOS.BIOS RecoveryIf a BIOS flash procedure fails to complete, perform a BIOS recovery procedure by using the Crisis RecoveryDiskette. During this procedure, the system will force the BIOS to enter a special BIOS block, called bootblock, 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. Attached a USB floppy drive to the computer.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 beheard.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.