Back when BIOS chips were socketed, I once flashed the wrong BIOS onto my motherboard's chip, so it wouldn't boot. Luckily I also had an older motherboard with

Back when BIOS chips were socketed, I once flashed the wrong BIOS onto my motherboard's chip, so it wouldn't boot. Luckily I also had an older motherboard with the same BIOS chip model. So I booted up the old one, pulled its chip out while it was running, put the new one in and flashed the new board's version - without using any special tools at all.