Why is my iPhone working but the screen is black?
My iPhone was damanged over the weekend and the screen was shattered. I ordered a new screen and replaced it yesterday and everything was working fine except the earpiece and proximity sensor. I took the phone apart today to fix it and my screen went black in the process. I have checked all of the connections, especially cable #3 and nothing looks out of place. The phone is still working as I can receive calls, emails, etc. I removed the lcd from the glass and it does not look broken at all. Any suggestions as to what is going on? This is the 3rd time I have replaced my screen within a year and this is the first issue that I have had. Thanks!!
I would first try to reset the device: press and hold the home and the sleep button at the same time until the phone restarts - that should take around 10 seconds (if you have it connected to a computer, you should hear a disconnecting sound) - let it boot up and if you're lucky - it will be fine - if not, we'll have to dig deeper
Take apart again, and remove the logic board, to kill all power to it.
Leave apart for a while to drain power in chips etc,
Re assemble BUT do not try to turn on until the screen etc is reconnected,
I have had the same problem on a few phones, it happens if you try connecting the screen while the phone is still poered on, it must have some sort of safty feature thats reset after disconnecting the battery