On the release of GoW3 i obtained a GoW3 xbox 360 aswell as a GoW3 armored vault. During the first week it was all fun and dandy till one morning i got on the 360 and as it got to the point of trying to sign in to xbox live the 360 shut down, it wouldnt allow me to turn it on there were no red lights on the 360 or the power brick so i just unplugged then plugged it back in and it was working so i dismissed it. then about 3 days ago it happened yet again same problem but this time i left it and it turned itself back on after about 5 minutes then yet again shut down. It also happened yesterday and yet again today so i took it in and got a replacement from EB Games, so far it hasn't happened again but i'm wondering if anyone else has had the same issue so i can at least put my mind at ease. i ended up cutting out the overheating possibility when in discussion with the EB store manager, we figured it couldn't be overheat since there were no red lights going off on anything etc and it always happened only after a few minutes.