My Samsung galaxy s4 screen turned black while I can hear the notification sounds and touch is working fine. It was under my pillow last night and I think it came under my head. In the morning, the screen turned green with line and then it turned black. There are no scratched and also the screen it not broken or anything. When I take out the battery and reinsert it powers on but just won't display and black screen appears. I opened the phone and checked its LCD and grip and everything is fine and then closed it and turned it on again but still screen appears black? Please help me figure out what happened to it. Thank you
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