My screen just went black for no reason!! I had just looked at a text 10 minutes earlier. Felt it vibrate for an incoming text and when i went to check it all i got was a dark/black screen. I could see the lights at the bottom lit and i i could tell the phone was on because i swiped down on the lock screen and felt the home buttons react. I have taken the battery out twice, and still i dont see nothing. Any ideas what this is or how to fix it?