I'm currently stuck: after trying to install a new video driver (which didn't work), I, ahem, disabled default VGA driver (VGAENB or something?). After I rebooted, I got exactly what you'd expect to happen:
computer works, but no picture. (I know it works, because hitting the 'off' button on my keyboard results in an orderly shutdown.)
No harm done: just use Safe Mode or VGA mode, right?
Wrong: while I do get the menu screen to select the different modes, the results is always the same: after selection the mode and hitting enter to continue booting, I get a blank screen. I seems as if all video drivers are disabled now, even the safe mode one. :-(
Some guidance about how to resolve this problem would be very much appreciated.