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Home button not functional

It started with Touch ID failing. Then the home button wouldn't wake the device, but once it was awake with the power button, the home button would work. Now the home button doesn't work at all. I took it to uBreak iFix and they tested the home button and it was not the issue. At this point, the phone was 3 years old, so I upgraded to the 7 Plus, but I still have this phone sitting in a drawer. I got the home link cable and replaced that last week, but there still is no function in the home button. Someone on Reddit who claims to be an Apple technician said that replacing the display will fix it, but that doesn't seem right on the 6 since the home cable isn't integrated into the display like the 6S is. I'm really only doing this to maybe resell the phone and I just want to know if it's even worth doing to try to sell it. It's the 128 GB, so maybe there's some value there, but if that eaten up in parts cost, I won't bother.

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The Reddit Apple's technician's suggestion comes from a well meaning place, but also a place of ignorance.

When you are an Apple technician, there are only four answers to any problem:

1. Restore the software

2. Replace the top assembly

3. Replace the battery

4. Replace the whole phone

The iPhone 6 top assembly includes about 8 parts that fasten together with screws (in this example, including all of the glued-together parts that make up the "screen" as one part). The top assembly also includes the home button and and the long flex cable which leads from the home button to the motherboard. Apple's technicians never take apart this top assembly. They consider the entire top half of the phone to be the "screen," including your home button and long home flex. So when you bring your phone to an Apple store with either a home button problem or a screen problem, they always change both together. This is also how earpiece speaker or front camera problem are fixed at Apple - by replacing the "screen." It's good in that Apple wants to ensure a high level of quality control though more new parts/less labor, but bad in that when you need a $2 speaker or $5 flex, the answer is a $149 "screen repair."

The Apple store is the only option if you want a new home button to include Touch ID. However, the independent store you brought to phone into has already tested a new button for its ability to click. You have already tested a new long home flex. As far as your issues are concerned, having Apple change the whole top assembly will accomplish no more than changing the home/home flex. You may want to visit one more independent that has both parts in stock, just in case a part new part caused this issue to be misdiagnosed. Find a local shop with good reviews that will not charge a diagnostic fee if they cannot fix it.

Beyond that, your problem would have to be caused by damage to the home button FPC Connector on the motherboard, or damage to the Touch ID circuit., meaning power is not being sent to your home button in the first place.

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But both of those parts are integrated into the logic board, right? That would mean it's not even worth bothering with the repair since the logic board is $250 and the phone probably isn't worth that much.

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Try to reball ic u2100

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I'm pretty new to electronic repair. What does that mean?

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Check fpc home (j2118) pin no.2 from top left, if not looping circuit replace R2160.

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If the screen was ever replaced on the device, I would check the flex cable on the home button for damage. Some repair techs are not re-sticking the home button gasket to the screen, which keeps the home button securely in place. When the home button gasket is not attached to the screen, the home button can begin to spin slightly left or right every time you press the button. This will eventually cause micro tears in the flex cable and eventually lead to a completely torn cable which will not work at all.

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The display has never been replaced, but the home cable has been.

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That sounds pretty odd to me that the home cable would have been changed. I've never had to change one of those and can't see any logical reason why a ribbon cable would go bad.

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