Chosen Solution
I’ve replaced a lot of iPhone screens and just replaced an iPhone 6 Plus screen. After resetting it everything worked properly so I screwed down the bracket. When I went to close the screen I noticed it was blank. I hooked it up to the computer and the touch screen is responsive, just not the LCD. What could be my issue? I’ve tried two other screens and neither of them will work either.
Here is a guide for you: Why iPhone Won’t Turn on after Screen Replacement
I fixed it. I unplugged the battery and cleaned the connectors with 99% isopropyl alcohol, dried, and gently reconnected it all. Everything works now :) Edit: I got up this morning and tried it out and now it won’t work again :(
I think it’s time to send it to a microsoldering professional. It isn’t the backlight filters, because then it would have some kind of image with a light shining on the screen just right. I would guess that it has something to do with the 1.8 volt line on pin 29 of the lcd connector. I could very easily be wrong about that though.
Could also be that one of the pins bent or broke on the phone itself in the connection on the logic board. Check the pins where the display cables connect to.
