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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?

You did everything right in terms of troubleshooting. It sounds like the LCD has gone bad. Luckily, this is is a relatively easy fix if you take a look at the iFixit guide. This will also provide the link to the kit you will need in order to do the repair if you do not have the tools. Just so you are aware, the part does not include the home button or the front camera assembly. These will need to be transferred to the new screen. Be sure to use heat to remove the button and camera because simply pulling them off can tear the cables. Home Button Guide Front Camera Guide