would a bad hdmi cable cause random green and red pixels to appear all over the screen, its an lcd tv, got it new 3 months ago
All over the screen, moving? Yes. All over the screen, stationary? No. If the erratic pixels are staying in place, it's a problem with the TV; the cable is incapable of screwing with absolute locations on the screen. If the pixels are fluttering all over the screen, it could possibly be a signal problem in the cable. Cables don't generally go bad though (especially HDMI), so it's unlikely. Definitely try another cable or another device (like a blu-ray player instead of the Xbox).