He's also going to try working with it by reinstalling the old video card to see if it helps.
If that should fail, he's going to go to bed for the night, so please leave any ideas or comments in LJ. We both appreciate your help and love. Ever so grateful for good friends and advice.
UPDATE: The computer keeps trying to boot from CD, which it shouldn't be, apparently. That's what seems to be failing, and he doesn't know why, as he doesn't have that set up in the bios. Old video card was no help, it seems.
Thanks again, and if anyone has any clue, drop us a line.