So here's the situation my s4 wasnt dropped and it has no water damage. I was just texting someone and set my phone aside, once I heard I the notification ring I picked my phone up and pressed the power button and it got glitchyy like green and white vertical lines showed up. So for a day I let it rest took out the battery and such. And it worked but then once I pressed the power button to turn it off the lines would appear again and then black screen. After that I tried switching batteries, draining the battery, smack method and none worked. The led turns on and u could hear notifications but the screen is black. Btw the smack method actually worked once but never worked again. It has no cracks so the lcd is not a problem I think..... please help!