hi above answer is correct except if you dont swap pcb you will not beable to play gamedisc not xbox live .pcb has key on that has to match motherboard.there is another way just change laser in drive about £10 inc postage from console mod shops.(easy open up unclip ribbon cable fit new one clip back done)
ant
August 2010
Do's it play any other discs? If not its probably your disc drive.
I had the same problem and found out that it was the drive that was at fault, but follow a guide if you plan on repairing it yourself you'll have to take both drive apart to exchange the pcb's inside otherwise you'll loose your xbox live membership!
hope this helps?!
Mophead
August 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix games consoles.