Chosen Solution
Hello everyone. I’m a repair man for 3 years now and I repair phone every day for the past 3 years and I have never seen this before. I have replaced iPhone 6S screen for a costumer of mine and 12 hours later she came back claiming the screen isn’t working. looking at the device it looks like the backlight is not working in addition looking closely on the board I didn’t see anything suspicious that could have gone wrong during this repair. I have tried 2 other screens + her original apple screen and the problem is still there so I know that there is something wrong with the board that I cused it. Any of you know what I did wrong in this repair so I could fix it? Could it be a backlight IC? if so can any of you show me where it’s located? I tried to look on-line for this and I didn’t find anything… Phone was turned off battery was not disconnected.
Did you disconnect the battery prior to doing the screen replacement? It should always be the first thing you do after you take out the two pentalobe screws and lift up the screen. Backlight ic is usually near the LCD connector on the logic board. I think you could check to short to ground / continuity on components to find it if I’m correct (Isn’t it like a fuse to the backlight or is it more than just that?).
