I brought in my iPhone XS Max for a battery replacement, but they told me the pins on the cable connecting the True Tone display to the motherboard came off and stuck to the motherboard. So, they had to replace it with an aftermarket OLED screen without True Tone. Does this happen often?
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I personally haven't heard of the problem you're describing, but I have no evidence that the repair shop is being untruthful or that things didn't happen the way they said. We do have a few contributors who actually work as electronics technicians who may be able to speak a little more authoritatively about it, so hopefully they'll chip in.
What I can tell you is that you're not out of luck regarding the True Tone function. The thing is, all it depends on is having a bit of data called the MtSN copied from the old screen to the replacement and your True Tone will work again. Even in a case like yours where the old screen may not be functional, you can still retrieve that data from the phone itself. All you need is a device programmer like the JC V1SE or the QianLi iCopy and you can program that MtSN into the replacement display and get your True Tone function back.
Those programmers run about $85 or so, but you may be able to locate a shop in your local area that has one and can reprogram your screen for you.
Interesting. It all sounds reasonable, but obviously they aren't conversant with reading the True Tone data from the phone when you can't get it from the display. This page has information on retrieving that data from the phone when the original screen isn't available or is non-functional.
How To Restore True Tone After Screen Replacement On iPhone XS - iFixit Repair Guide
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When they tried to remove the display for a battery replacement, they claim the pins got stuck on the motherboard. They said they never seen it before, and said it could be dry rot etc. No damage has ever happen to this phone other than needing a new battery. Now, they're saying they can't transfer the calibration data to the new display, due to the pins on the cable being separated. They are the only Apple-certified service center around my area, and were able to use apple genuine battery, and software to not cause the aftermarket display to keep showing messages. It’s a CPR shop just seems odd. Any comments are appreciated, as I want to believe it was the phone and not them.
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