I'm glad the problem is solved but I'm perplexed how any BIOS setting could
disable all video. In my experience teaching computer hardware and trouble
shooting systems the odd time I have had to replace the video card
temporarily with a very basic one (sometimes just PCI) to be able to enter
the BIOS settings. That's a very rare situation though; more common is the
balky video card that causes a reset before the sytem is fully started, in
which case a bootable O/S, VGA only or safe mode start usually allows the
operating system to be adjusted.