Stop telling him to buy the slim everyone. He obviously wants answers on how to fix it. I would say that it's the disc tray as that is the only moving component in the xbox 360. What you need to do is get a security torx screwdriver that you can buy off of ebay or at you local radio shack for a cheap price. ($4 or so) Take apart the white outside casing with a flathead screwdriver. Then, use the torx to undo the metal casing underneath the white case. Then, you need to locate where the disc drive is and use a small philips scewdriver and open it up. Then, take the magnet off of the top of the case to the disc drive and trash the rest of the case. Then place a disc into the xbox tray and place the magnet ontop of the disc. The disc should spin and you can play your game. The only problem with this is that your xbox has to stay opened, but atleast you don't have to hear the horrific noise!
-Famous