Before attempting to reflash any board the concept of first backing up the present bios is something most never take into consideration. When you had to manually flash a bios while booting from a floppy that was one thing always done first in case of a bad flash.
Winflashes generally go right without problems if you simply let the flash tool sit long enough to finish. Without even the initial post you can't even set a floppy drive if you had one as the first boot device in order to use a manual flash tool to fix things. You can pull the battery to see but don't expect much.
Someone else I know just ran into this only with the flash option at post time that went toast! Nothing later! New build time!