I've had my phone for about a year so its not super old. I always have the case on and it has not suffered great falls. I tried taking the battery out method which didn't work. I also tried charging it for a couple of hours, in case the battery was dead but I'm sure it wasn't because it was on the charger when it decided to be dead forever. The only thing is my phone has had a random green line mainly noticeable when the screen is off. The green line looks like when you press way to hard on your screen. It also if I do push hard on my screen the line moves closer to where I'm pressing. Its been there for only about a month and really only noticeable when the screen is off. Did something break in my phone that caused it not to turn on?