I have a iPhone 4s which was initially having issues in iTunes while ‘Restoring software’. It was giving ITunes error 21. There was not display when I had received this iPhone to begin with.
I have now managed to do the firmware update successfully.
But the issue is:
1. No display. When I switch it ON, the apple logo appears for like 1 second and then screen is black.
2. I have tried with other screens but same.
Please advise which IC’s I need to replace or reflow to get the screen working?