Hi,
you would usually flash/update the old bios, with the new bios via floppy disk drive, or cd if your motherboard supports it. if you go to the manufacturers web-site-support or downloads. you should be able to get the latest bios for the board. also read any notes on " flashing the bios " if the board won,t boot, you can,t damage it anymore than it already is. nothing to lose everything to gain.
if you have to send the board to be unsoldered/re-soldered very expensive usually.

if this information solves your problem, please rate as Fixya.

Many thanks for using the forums.

Mike @ compurepair.

There are two different BIOS files shown for your motherboard. Make sure you get the right one for your chipset. The instructions for flashing the BIOS are here.