Black screens ahoy

[legendarywatermelon]

One day when I started up my computer, it got to the desktop, then
about a second later, the screen went black, and my computer got all
quiet, and everytime I tried to restart, it showed a black screen.
Nothing more, nothing less. I put in a new power supply and video card
in recently (Radeon X700), so I assumed that was the problem, so I
switched back to my old power supply and old card (Radeon 9800 Pro),
and started it up. After getting to the Windows XP Professional
loading screen (With the moving blue bar at the bottom), it would go
black, flash, black, flash, then stay black until I restarted. I then
started it in safe mode, and everything was fine in that, so I
uninstalled the drivers, and restarted normally, and it worked...
Sorta. If I...

1) Re-install the drivers (Catalyst 7.11), it will install, ask to
restart, so it does, then reaches the desktop, and a short while later
(15-20 seconds), it will lock-up and not respond to anything, and
uninstalling them in safe mode will bring me back to the "sorta
working" stage

2) Go into the display settings, it's at low colour quality, and if I
try to increase it, it will go black and not respond. When restarting,
it will do the 3 black screens like when I first just switched back to
my old hardware

Any ideas of how to fix this?

 

[sgopus]

Sounds like windows doesn't like your video adapter drivers, try an older
version
did you get your drivers from the vendor or microsoft?

 

[Plato]

One day when I started up my computer, it got to the desktop, then
about a second later, the screen went black, and my computer got all

Black screens of death are very common with teenagers who like/want to
overclock their cpus and/or video cards.