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Phone reboots repeatedly after screen replacement

I replaced the screen on an Apple iPhone 15 with an LCD panel. My eyes do not like OLED screens. The panel looks great but the phone keeps rebooting every couple of minutes. I also get a message that the display is not recognized despite having run through the Apple repair routine multiple times. It always says genuine apple part even though it’s not from Apple. Any suggestions. I have looked at the analytics log but it is not logging the crashes.

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In answer to the original question here that I didn't see until now, an LCD replacement screen should not be causing boot loops; if it does either the screen is defective or something was broken or done wrong in the process of replacing the screen.

With any aftermarket screen it is not possible to eliminate the genuine parts message no matter how many times you run the Repair Assistant. It's curious that the utility seems to think you do have a genuine Apple screen even though that's not possible since Apple does not make LCD replacements for their OLED iPhones.

Probably too late to help now, and I know you've said you checked the analytics, but just to cover all the bases, check out the kernel panic wiki page to make sure you're looking in the right place for the right files.

iPhone Kernel Panics - iFixit

If by some miracle you do find a panic log, come on back and post the first page on your question; after that we should be able to diagnose the issue causing the reboots.

One caveat regarding LCD replacement screens that they don't tend to mention is that you're going to find your battery life shortened. OLED screens don't need a backlight since each pixel generates its own light, whereas on an LCD the pixels require a separate light source - i.e., the backlight. So an LCD display will always require more power than an OLED display, meaning your battery won't last as long before needing to be recharged.

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The issue was caused by the non-genuine LCD’s display IC failing the SMC/TrueTone verification, which led to repeated reboots. I resolved the problem by visiting a third-party repair shop, where they installed an original LCD taken from an iCloud-locked iPhone. This display contains authentic Apple IC data and is properly recognized by the system.

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I disagree with your analysis of the original poster's problem. The aftermarket industry has been making screens for years now, and they have figured out how to make them compatible with iPhones, with the exception that they can't be paired, and thus you cannot eliminate the genuine parts message with a non-OEM screen.

Basically it sounds like you got a bad screen which you could have worked around by either getting a warranty replacement or trying another vendor.

But yes, a genuine screen will work 100% correctly and now that the Repair Assistant is available all functions can be restored with an OEM screen.

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