I bought a 360 a few days ago. I've had one freeze (the first time I booted BG: DA2), which was fixed by opening the disc tray and closing it again. Also, I usually turn off my powerpad when I'm done playing to save energy, and after such a cycle, my 360 sometimes won't send any video or audio signal until I turn it off, unplug the video cord, plug it back in and turn it on again.