it quite easy to blind flash m8 ,
just make a dos boot disk (use drdflash.exe (google it)),
once done download and copy atiflash309 to the floppy .
then either download a bios from this site or better still use your backup bios (if you made one)
rename the bios to something easy , like new.bin
then restart the pc with the floppy drive in , it should load the floppy (you should hear this, as long as the pc is set to boot of floppy first in the bios )
leave the pc for a minute or so,
the type
atiflash -newbios -f -p 0 new.bin (this is number 0 not letter o)
again you show hear the floppy working , and leave for a minute , remove the floppy , and his the reset button on the front of your pc ..
It's quite easy , just type carefully