Wait at least 5 minutes before you restart your PC!.Copy the autoexec.bat and also your flashtool and the BIOS file onto a bootable DOS media (USB flash drive, CD, floppy disk).Insert your update command into the autoexec.bat (see Start the BIOS-Update).Create a text file and rename it to autoexec.bat.Even better: it can start automatically when you rename the batch file to: autoexec.bat. The batch file can contain multiple lines of commands, with line-by-line, from top to bottom, a special command can be executed. But it is possible to create a so-called DOS batch file. If the BIOS-Boot-Block detects a bootable DOS media, he tries to boot it and restarts a new BIOS update.ĭue to the fact that the monitor screen is black, we cannot make any keystroke. This BIOS-Boot-Block ensures that a PC can start the boot process, and checks, what is important in our case, if a bootable DOS media (USB flash drive, CD, floppy disk) is present. So you can boot your PC from this CD and have to wait ~ 5 minutes.Įvery BIOS-Chip contains a special data area, the so-called BIOS-Boot-Block. Some mainboard manufacturers such as ASUS enclosing a driver CD to any sold mainboard (in the original box), which contains a BIOS update file. Driver-CD with integrated BIOS update file:.

Take a look into the mainboard manual how to reactivate a Dualbios.

A special keystroke during the boot process.

Setting a special jumper on the mainboard.The BACKUP-BIOS takes automatically control after the next reboot and copies his chip data content onto the MAIN-BIOS-Chip.Depending on the BIOS and mainboard manufacturer, there could be various methods to reactivate the MAIN-BIOS-Chip: One is the regular chip called MAIN-BIOS, and the other is the BACKUP-BIOS containing an intact copy of the original BIOS. Mainboards with DualBIOS have two BIOS-Chips. Dualbios (Mainboard with 2 BIOS-Chips):.The exact procedure should be found in the mainboard manual! You should always reset the CMOS after updating the BIOS, because your old BIOS settings could not work together with your new BIOS version. So do not be surprised if you find both company names together on the BIOS setup screen. Note: the BIOS manufacturer AWARD have been taken over in 1998 by his competitor PHOENIX. So don't panic and wait a few minutes longer to make sure that the update process was terminated. If the update process starts, it may be that (depending on the flashtool and BIOS vendor) different beeps are heard.

Depending on the method, we would need again a bootable DOS media, from which we will try to make a blind BIOS update.

Because there are some methods for reactivating your PC. PC do not start after BIOS-Update? Blank screen and nothing happens?

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