Ok, Here's the situation.  
 
I recently bought a new video card for my parents' computer (Dell Dimension 2400; Celeron system). It has onboard video and they wanted to play some games that required more. I bought an EVGA GeForce 6200 (PCI). I installed it, the card was recognized and windows loaded in 640x480. I loaded the drivers from the NVIDIA website (as well as the accompanying CD on the 2nd try; same result). It claimed to be successful.  
 
Once restarted, all was fine, I got the XP loading screen, but then when it went to display the desktop, the screen appeared to be changing resolution and never comes back on. Based on what's coming from the speakers, it seems like windows is finishing the loading process.
 
My only theory is that the card wants to default to a higher resolution than the CRT monitor can handle. Should I try hooking up an LCD?
 
Also, the 2 options in the bios for the onboard video are "on" and "auto". With auto selected, and the monitor cable plugged into the pci video card, the bios screen and XP load screen display fine.
 
Any ideas?

Ah...Dell Dimension 2400...those things are NOTORIOUS for having problems with PCI video cards.
 
Since you got as far as getting POST and the splash screen to display on the PCI card, I'd say the problem from here is drivers.  
 
1) If you have a second monitor, plug one into your onboard and one into your PCI card.
 
2) Download and install the drivers for your card.
 
3) Reboot.
 
4) ????
 
5) Profit? (hopefully--let me know)

That's a good idea. In that way, it would be like having multiple displays and hopefully I can troubleshoot one from the other. We'll have to see if the bios will let both be active under the "auto" setting.