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So I heard that after replacing the motherboard the original Touch ID won’t work. How can I pair it with the new Touch ID. So that it works with the new mother board. Do I need buy a new Touch ID or can I program the old one to the new one and how do I program it.
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You would need the Home button that was originally paired to the replacement logic board, or you would need to get Apple to replace the display so that the home button in the replacement display could be paired with the board.
Home button function can be recovered by certain third party home buttons, but touch ID function is something Apple themselves would need to do.
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the home button and motherboard as mated/matched/paired at the apple factory. only apple can re-do that programming when they replace the motherboard or home button or both during a repair.
the best that you can hope for is to get a 3rd party button (like a YF or JC) and a programmer (like a JC or a Quanli) and copy the ID from the original home button to the replacement button. unfortunately, if it works, the best you can hope for is the home button works and you will only get the Touch ID Unavailable when the phone starts from a reset/power-cycle. if you're not that lucky you will likely see IOS turning on Assistive Touch on-screen home button all the time (even when you turn it off) for IOS 15.6 and higher.
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The main reason I never recommend iPhone board replacements; once the board dies, the phone dies.
@nick Yes. I see the reasoning behind a board replacement. But it would never be the first route I recommended because so much functionality is tied into the original board.
Board repair on the other hand 👌🏻 depending on the person and the reason you're repairing. I have fixed logic boards more than once by kicking off one bad capacitor.
@flannelist And that’s fine as you’re not throwing away so much pairing, you’re fixing your old board. Assembly swapping is dead because of TouchID/FaceID and TrueTone pairing since you need the matched parts, now batteries. At that point buy a replacement phone.
@nick Yep. I think that’s what they’re banking on. Fear and ignorance.
Also you forgot cameras on the newer models. (It’s utterly absurd how many parts are serialized these days). It’s a matter of buy a new phone, buy whatever parts you can get at Apple markup, or deal with an epic ton of warnings about how you’ve defaced your beautiful Apple device and loss of whatever functionality depending on which serialized part(s) is mismatched. The hoops people in the independent repair community are jumping through now to keep up is just ridiculous.
Related: Looks like even the original button won't work if you accidentally first installed a new screen+digitizer with an integrated (new) button. iPhone notices the change of the button and even if you return the original home button, the damage is done and no button will work. If I'm wrong, please let me know.
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Apple uses a proprietary encryption algorithm to generate a unique key for each Touch ID fingerprint sensor that guarantees it's paired to a specific logic board. When you lose the original home button you've lost that key; it can't be read or duplicated.
As @flannelist mentioned, the only way to have a working Touch ID is to buy a replacement motherboard and its paired home button. Apple alone can replace a home button; they keep a very tight grip on their encryption algorithm and don't let anyone but authorized service centers even generate the key and program it into a button.
So just to reiterate; if you didn't buy the home button along with the motherboard, then you won't get Touch ID working again, period. There are no aftermarket buttons, parts or programmers that will make it work.
A trip to the Apple store is the only way to get a Touch ID repaired. I seem to recall you can't just ask them to replace the home button; that doesn't seem to be one of their services. If, however, you have the screen replaced, then they'll also replace the home button and you'd get your Touch ID back. That assumes they'll even work on it since the logic board has been replaced; if I'm not mistaken they tend to refuse to work on phones that have been repaired by non-Apple persons.
There's also the self-repair program, assuming it supports your phone. Of course, you have to buy the parts from Apple and rent their repair equipment, but it might be possible under those circumstances.
Alisha, have I stated these last two paragraphs correctly or am I just blowing smoke out my a$$?
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i've not dealt with the apple self-service program yet, but yes, i do believe that everything you have stated is accurate, including the last two paragraphs.
the one thing that probably should be added is that while it may not be as expensive as having apple do it, it still will not be cheap.
@beekerc Yeah, the self repair service isn't everything we'd hoped for when it only works if you buy their parts and pay to use their equipment. Better than nothing, but far short of what we want.
@dadibrokeit Yup. No such thing by Apple’s standards as just a home button replacement. Which I absolutely do not understand. But that’s beside the point. I doubt they can justify that it’s “unsafe” to replace separately. It’s just the cable is small and fragile and probably they decided there wasn’t enough money in it? Or its more cost effective to do it with the screen? Who knows.
Either way. New screen installed by Apple is in order if you want Touch ID to remain intact. The 2020 SE is not included in Self Service repair last I knew, so even that isn’t an option.
actually now that i think about i can think of why apple won't do just a home button replacement. this is based on my experiences with removing the home button bracket, trilobe slippage, stripped screws, etc. if the apple tech removes the home button and bracket from the screen, they're on the hook for anything that happens to the screen during the repair, and may be subject to claims against screen damage that was there before the repair even started. plus there's the added time and cost for the labor of the button swap out, the screen still has to be removed and re-installed, so that labor/time is there regardless. and it's a procedure they don't have to train their techs on.
that's the justification as to why, but ultimately i suspect the real motivation is money. why sell the customer a $20 part/service when you can sell them a $300 part/service. it's not like Apple is a anti-DYI, money grubbing, evil empire or anything.
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