Turn off your Xbox 360 console, disconnect and reconnect all cables, and then turn your Xbox 360 console back on. If this step doesn't resolve the problem, try step 2.
Turn off the console, and then disconnect any connected accessories, such as controllers, Xbox 360 memory units, and the Xbox 360 hard disk. With these accessories removed, restart the console to see whether the problem persists and to pinpoint whether it is the console or an accessory. If this step doesn't resolve the problem, try step 3.
If you continue to experience the problem, contact Xbox Customer Service. If the Xbox Customer Service agent cannot help you resolve the problem, you may have to return your Xbox 360 console to Microsoft for repair. For more information about how to contact Xbox Customer Support or to request repair of your Xbox 360 console, please visit the Xbox Support (http://www.xbox.com/support/) Web site. if this does not help you will need to send it back to microsoft for repair, in that case i hope you have deep pockets or a warranty.