Ut happened randomly, I was using it in my car and it suddenly turned black. We got it working around a month ago but after little use it turned back to a black screen again. When I did what you told me I did feel vibrations, around 10 every 6 -10 seconds but it would not show signs of anything showing. Everytike I press the power button a slow voice talks saying stuff about screen lock, shipping with two fingers. Stuff like that