I replaced my Lite on drive with a new one, swapped out the motherboard, and have the same problem. My drive reads music CD's and DVD's, but when I put any original 360 disc in, it will start to play for a few minutes, then read "disc error". I can start a game, go on live and play in a match for a few minutes, then get the same "disc error". I triple checked the solder and the ribbon that goes to the lens. Is it possible I got a bad drive from the person I bought it from? What is wrong with this machine! Please help me.