|In the old days it used to be true if the BIOS flash went bad, you were out of luck, not so much anymore. Usually it will ask you if you want to do a backup of the current BIOS setup before you install the new one. Did you do a backup?|
Some computers such as Dell have a BIOS setup permanently burned into the CMOS chip that can't be altered so if the flash goes bad, you have a working version to revert to. I'm not sure if Toshiba has this option but you may look around Toshiba's website in the troubleshooting section for repairing the BIOS.