My screen stop working yesterday. It's black and when I press the on/off button the screen lights up but is still black. The 3 touch buttons at the bottom goes bright. The touch is working because if I swipe over the screen it vibrates when my pattern password is incorrect. I can access the screen through Mi PC and control it. I tried to make factory reset but nothing changed. Any one had the same problem? What should I do with the phone? Thank you for the help!