Instructions
Insert an Xbox 360 game into your Xbox 360 drive. Wait a few moments and the game should automatically start. Eject it if it does.
Insert a movie DVD into the Xbox drive. Wait a few moments and the DVD software should open.
Insert an audio CD into the Xbox drive. It should automatically begin playing the audio files.
Repeat any test if it does not work; if another type of disc fails, then you know your drive is faulty.