I bought an XBOX 360 for my son less than a year ago and I think it is a great system. My son loves it. I just noticed a BIG problem today, when I load a game it will progress until I try to use a saved game and then the screen locks up and a 'patchy' effect covers the screen with a buzzing sound. This happens to all his games and at one stage I could not get any games to work. Can anyone tell me if this is a common problem or how to fix it. Thanks heaps.