Released on September 19, 2014, this 4.7" screen iPhone is the smaller version of the iPhone 6 Plus.

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Multiple screen replacements, still have unresponsive screen

I installed a new screen a while back from ifixit and it worked perfectly. Then, out of the nowhere, it stops responding to any and all touch. I called ifixit and they sent out a replacement, which worked for about an hour then it stopped.

I have restored to make sure it wasn't software related but no improvement. I have found that if I put pressure on the phone by slightly bending it, then the touch comes back.

Is this touch disease? I have absolutely no grey bar.

Thanks

Answered! View the answer I have this problem too

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Does it work fine when the display isnt in the metal body? Like just sitting on top. Also have you mase sure your connectors are plugged in all the way?

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It is starting to sound like Touch Disease. The iPhone 6 does suffer it less than the 6Plus but it still happens. The twisting of the housing is what gives it away. As for the grey bars, they aren't always present, at least initially.

But first, check your connections as @cam2363 suggests and see if it has anything to do with the housing. Ideally, you need a known-good screen (new does not mean known-good) to completely isolate that variable. However that is not always practical for an end-user. Two screens from iFixit should suffice at this stage.

Touch Disease is not a DIY fix so your best bet would be to find a reputable micro-soldering repair shop for a proper troubleshooting and repair.

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How do you repair touch disease? Like what part goes bad?

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@cam2363 Seriously?

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@refectio Yes seriously. I have no clue. Im just trying to learn some new info. Im not trying to be smart or anything.

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It's a chip that has non-leaded solder balls under the chip itself and pretty much floats on solder balls (BGA. ball-grid-array).

It requires careful removal shielding off other areas from heat because a hot-air rework station and like 475°C is required to remove the chip. The metal shields on the logic board for where the touch IC is located would need to be removed as well.

Tips for people that do micro soldering on iPhone boards:

What a lot of people do when cleaning up the solder pads for the touch IC chip is break the pads off, the key is to use the wick but don't put pressure on the pads when wicking off the old solder. Allowing it to glide is the key, just takes time and patience.

Don't allow the wick to get stuck on a solder pad by making sure the soldering iron tip does not come off the wick before removing the wick from the solder pads.

I personally have never done micro soldering and I get my other technicians to do it.

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