I hooked my PC up to my 44 inch Plasma and i got some problems occuring. Please help!?

Ok, i got this 44 inch plasma screen TV, i hooked it up to my PC. My PC specs are, 2 gigs ram amd 6000+ 3.1 ghz. GTX 260 and some Asus mother board deluxe or something. Well, its been working great and jolly for a few days, i'll be playing a game such as wow and then out of now where the screen will go black and say "No Signal" and i can't hear sound anymore from my headset, but all my computer lights and keybard/mouse lights are all still on, the fans are still going. Just i cant hear or see anything, it looks like its just shut down. So i explained it to my buddy, he said get a new case, so i ordered the Antec 1200 with 5 fans and with a big house fan on the side of it blowing in cool air, still i have the same problem, i have never had this problem on my 17 inch Proveiw LCD. Please help, i would like to enjoy gaming on my 44 inch plasma without it cutting off to "No Signal"

Answer:

I doubt the TV screen is to blame, the video card here is the culprit.

There could be many reasons why your video card stops putting out a signal, maybe a screen saver and/or power saving settings are kicking in. Have you tried disabling these settings??