I built this system little over a year ago and never had a problem until now. When I go to boot up it gets to the blue screen with the Windows XP logo then the screen goes BLACK and get a box that says DVI no SIGNAL and then goes black. I can go into safe mode and remove the drivers for the video card, ATI X600 PCI Express, and reboot and windows will come up and work in VGA mode. I can reload the drivers but still have the same trouble.

I have downloaded the newest drivers and installed them for all the hardware in my system and still no go.

I reformatted the hard drive and put in a clean install of windows xp [twice] and it worked for about 4 days and it went back to the same thing. I took out one of the 512 memory chips of ram and it worked for a couple of days and went back to not booting up. Put the the 512 memory back in and worked for awhile and then went down again. At this point I replaced the video card with ATI X800 Pro installed the latest and greatest drivers and it worked! But only for a day. I have done a clean boot and I get the same results so I don't think this is a software problem.

The next thing I did was replace the mother board as there is not not much left and it worked for three days and now I'm back to where I started.  

I hope that someone here can give me an ideal of some things to try.

Antec True POWER 550
Sony 710 DVD
Abit AA8 DuraMax
Corsair 512x2 ram
ATI X800 Pro Video Card
Maxtor sata 160 Harddrive
p-4 3.2

Thanks.. Rick
It worked fine with the original video card and then you upgraded that and started having problems? That SEEMS to be the COMMON denominator - the video card.

I started having troubles before I replaced the video card.  I thought that the card was giving me trouble so I replaced it.