I currently have an iPhone 4, and I have a spare 4S lying around my room. However the backlight has completely broken on it and it still boots up but you can't see the screen. Does anyone know how I can repair this? Would I need to replace the entire front plate or just the backlight? How much would this fix cost? Thanks to anyone that helps 
Hopefully this is in the right section.
Hopefully this is in the right section.
