I have an Xbox 360 Slim that was sent in for repairs in January of 2013, about a month after getting it. The problem was the disc tray would open and close itself during gameplay without input. Now we're 11 months later and the problem is back. This is a known problem because I've seen others report it as well. We've cleaned the buttons with rubbing alcohol swabs, but the problem persists.
Please skip the usual Ghostbusters replies.