Post, won't boot to Windows

My wife has an older machine based on a Biostar M7NCD Pro. While playing
WOW, the graphics became corrupt and the machine locked up. Upon a hard
restart, the machine would get to the Post screen, but with a series of
vertical dots on the screen. It will not go past post. After multiple
reboots, it also was not detecting the hard drive. I cleared the CMOS-
didn't help. Reseated the video card- no help. Flashed the BIOS - nope.
Tried booting to the Windows XP install CD- uh, no again. Stops at the
post screen, and then goes black. On one occasion it did try to get to
Windows- I got the "wait while loading" bar graphic (still corrupt
graphics), but that's where it stayed. Motherboard doesn't show any
obvious signs of failure (no leaking or bloated caps). Voltages in BIOS
hardware monitor are normal. Took out one stick of memory at a time and
changed DIMM slots- no luck.

Any ideas, or does my wife get a new computer for Christmas (I already
bought her a vacuum)?

Thanks,
Fitz
--
Your body is a temple boy,
You ought to treat it well
But you trash the place and rent it out
Like it's some cheap motel - The Badlees