It's got nothing to do with reseting the laser or whatever.... There are two switches on the tray mechanism. One for open and one for closed. The closed switch is not making. It's the one on the left if you looking at the tray. Due to wear from playing lots o games it needs to have some fine adjustment done to its position so that when the tray closes the gear mechanism will touch and close it. You will need to fully open the Xbox including the CD tray to get access to the switch. With the tray open you can see the switch on the top. I had a multimeter so could do the fine adjustment with a small screwdriver while measuring the switch state.... Good luck..... Rob