I once had a mobo with a f###ed up BIOS (can't think what else could do that),
that would boot just fine, if you would have managed to get the settings right.
Tried 3 different VGA-card (all were later prooven o.k. with the replacement-mobo),
and all showed rather weirds pictures in text-mode.
Wanna know how it looked ? Get you "classic" out, connect it to a TV or 15khz
monitor, select the A2024-driver and try to operate it ...
And yes it was that bad :-o