for some reasons,i guess overheating included, the 360 will suddenly not be able to turn on, and the green ring of light on the front of the console will be 3 parts red, some you can recover (mine) others not so and have to be sent back(EGM92), mine happened during ripping a music cd, but others have crashed and red-ringed for no reason on start up, or even out of the box, or going to the dashboard.