This also happens if I turn the system off while in a game, turn it back on, and play the game.
Sometimes if I leave the tray open for about 5 minutes and pop it back in it works, but I usually get sick of waiting and turn it off.
I hope you guys understood and can help me...
I called Microsoft a while back, and they sent me a box to ship it in. I didnt feel the need to send it in because I thought it was only the disc...sometimes, and didnt want to ship a second 360 back...
And I forgot to mention, my discs are in perfect condition...not a scratch on them.