I have been using a 36" hdtv as a monitor for my new computer I just built. It has a amd radeon hd 7750 I have had them connected with an hdmi cord because the tv has no dvi/vga ports. It has been working well so far but today I ran a game infinite crises and when I switched to fullscreen the monitor went black. there was still sound but no video. I restarted my computer and the screen was still black but with audio, I tested the tv and hdmi cord with my xbox and it works perfectly. I need help!