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Iphone 6 plus is dead. Blask screen and no charging signal bu under Itunes is working and charging. Screen is OK working on other phone, battery also OK - I have smal service and I dont know what should I fix. It can be U2 on main bord if telefon is working with itunes ??? Please give me some tips what should I check first and next etc …
Sounds like the backlight driver to me. You need to find someone who can do board level soldering repair.
Like Eric says maybe backlight driver, can you see the screen on when you hold a light up to it? That will tell you if the backlight circuit is to blame. Also check what amps the phone draws through the charge cable.
