Hi, I was using my iphone 5c just a moment ago and was on facebook, then the phone locked up, i couldnt do a thing, then the top quarter of the picture started to do almost like a dissolving thing so that the picture started disappearing, then the screen went blank, Here's the steps i have taken to resolve this. Tried turning it off using the power button - Did nothing, screen is still black Tried holding the power button and home button together - Did nothing, screen is still black Replaced the screen - Did nothing, screen is still black Tried plugging it into the computer and doing a reset - Did nothing, screen is still black However, i can ring the phone and it rings. So whats the problem? why has my phone randomly died? could it be that the gpu chip has committed suicide?