Boot with a good BIOS chip, swap the chips while the PC is on, run the flash
utility with the CORRECT bios file. I've done it half a dozen times and
never had a problem, except when using two chips that weren't compatible -
*POOF!*
Check the motherboard manual, and Google seek the "bios emergency
recovery" method for the make of BIOS you have (for example, Award,
AMI or Phoenix). Many BIOS have a boot block still functional, so you
could follow diferections found in manual or on the 'net to create a
floppy disk with the last known-good bios version on it (like the
version it previously used).
If all else fails, and the bios chip is removable, you can get someone
to reflash your BIOS EEPROM chip or a new one for ~$10-25..
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