GTX 580 Display Issue

[board2death986]

So a quick reference to the problem here;
http://www.tomshardware.com/forum/353013-33-display-startup

Basically my friend was vacuuming out his computer (I know I know) and he hit something and the system no longer displays anything past the windows splash screen. I've tried everything including a fresh install but once I load the graphics drivers, the monitor loses signal at the login screen and blacks out. I confirmed the system is still running in the background fine.

I can get the card to output if I go into safe mode, or if I uninstall the drivers and restart I get in ok, but once it reinstalls the driver the same thing happens. I've tried older drivers and I even took the card home to test in my PC and it ran fine (benchmarked with 3dmark 11 to stress test it).

At this point I'm down to it being a power issue (more likely) or perhaps a motherboard issue. . .anyone have any insight? I'm thinking I'll help him pick out a PSU to try out and if it solves the problem great, if not . .back to the drawing board.

 

[board2death986]

Just an added note, the system works fine with the video card removed running off the integrated SandyBridge graphics.

 

[board2death986]

New power supply was another dead end. Same results. Thinking it could be the video card again? The issue only occurs with this card when hitting the login screen. . also when plugged in this system or mine at home, would sometimes exhibit odd behavior when turning on. Pressing the power button would cycle on, shortly after power off, then a short pause and power on again. . .I'm at a loss.