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Repair information and guides for the iPhone 6 that was released on September 19, 2014. Model Numbers: A1549, A1586, and A1589

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Backlight on, no display, beeping repeatedly

So basically, I bought a iPhone 6 16GB off of ebay for a good price, mint condition. The seller said the phone screen doesn't turn on after a battery replacement, but it gets recognized by iTunes and so on. Sure thing, I plugged it in, phone turns on and gets recognized by iTunes. The screen didn't turn on though. I decided to buy a new screen and battery, just in case, and just installed both few hours ago. Now the Backlight lights up, which it didn't do before, but still doesn't display anything. Still beeps repeatedly, but only when it's plugged in, otherwise it just stays on. It also only turns on with the cable connected.

I tried disconnecting the screen cables multiple times, unhook the battery and letting it sit for 10 minutes (actually letting it sit right now for another hour) and the usual home + power button thing. Nothing helped so far.

Edit: Now it won't react at all, no vibration or sounds, no backlight, but it's still showing up in iTunes.

Update (06/08/2017)

I took the phone to a professional and it indeed had long screw damage. He himself though said it was super hard to find, since the previous owner did not do a lot of damage but enough to make my phone not function correctly. 80 bucks later and my phone is working again!

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Might want to check the 3 screw holes (Out of the 5) on the logic board for the screen cable ribbon cable metal plate cover for long screw damage:

A example of long screw damage is exposed copper traces seen in the screw holes like this:

Block Image

If this is the case then the logic board currently has a short circuit causing the phone to have display issues (depending on which hole it may be one or a combination of issues, usually stuck on apple logo boot loop, blue screen, no backlight, no display).

This can only be fixed by someone that does micro soldering (Some mobile phone shops do it) as it is very high difficulty repairing damaged traces on the board caused by long screw damage.

Just curious have you tried an iTunes restore for the iPhone 6?

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Im aware of the whole long screw damage issue and already checked it, but I don't see anything there myself. I've restored the iPhone multiple times already, it restores and get recognized fine, but like I said, it doesn't give me any feedback anymore other than seeing it on iTunes.

Im trying to get my hands on another display and couple other parts just to see if that fixes it. Otherwise im going to get it diagnosed by a phone shop to see if they can figure it out. It might have long screw damage, im not saying it's impossible, but like I said, I didn't see anything there myself.

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Glad that you got the problem fixed. It is indeed hard to spot without taking your time and looking with a microscope.

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My backlight is working but no display. How can it be long screw when I didn't place any screws back in the phone. I replaced my battery now my phone display will not work. I have tried 5 screens, all the same thing, backlight no display. please help?

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hyeon will be eternally grateful.
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