Monitor lcd problem

Complete system specs?
Check your card temps, it can be an overheating...
Also try reseated the card and make sure all of the cables are properly inserted...  

I'm having the same problem and I've done everything to try to fix it. I've even formatted my OS and re-installed it. Tried both beta, archived, and current drivers, and everything else.

My monitor works perfectly with the on-board crap video card, but sadly it doesnt want to work with my 9800 GTX. On the other hand, my 9800 GTX works perfectly with my other monitor, so I have no idea what is causing the problem since they both work it seems.

Did u disable the onboard gpu?
U can disable it from BIOS...

So what I did was instead of using a HDMI cable with a HDMI->DVI adapter to my video card, I am using a VGA->DVI adapter. I am now able to run my 1920x1080 fine, was just playing battlefield bad company 2, and no more red lines. I would suggest trying a new cable, or a different interface altogether if your card allows it.

Hopefully it works for ya.

^+1
Try as deadline527 said above...