And the plot thickens:
Today I was inspecting my GeForce 5200 Card, and I found a bent transistor. I straightened it out and thought "well, why not?". The PC booted... and it's showing no graphics problems as of yet. :yay: HOWEVER, The monitor still "flares" up at first startup, followed by the crash 30 seconds in to the system, followed by another crash, followed by stable performance. I did get a BIOS ROM sumcheck error again, but as I am writing this, the system is being very stable, with the 256MB card and FULL hardware acceleration. I'm still going nucking futs!
I have never flashed a BIOS before, and I'm considering it now. Is this an easy project?
PS: I used the fan speed/voltage/temp utility, and everything is within normal specs, so I'm either looking now at the power supply, OR the BIOS. Am I on the right track?