Andree27
The Rear Camera IC (U2501) can fail & stop supplying power to the Rear Camera ,
it is also related to the operation of the flashlight ...The flash will not work if the rear
camera has failed.

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U2501 is located on the rear of the board (just above the Wi-Fi Module)

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(U2501 provides power to the Rear Camera whilst its being used & no power whilst the Camera isn’t in use)
In addition Pad B2 is GND & Pad B1 is supplied via L1802 Coil which primarily provides the additional power for the autofocus feature...
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There is another problem that causes similar symptoms , WIFI reception antenna ...

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Check for a Micro tear in the Flex connector, issues with erratic charging, No touch ID, Bootloop (Recovery mode)
& overheating (possible the camera does not work) caused by a Microscopic tear in the flex... Removed the flex connector & all of the issues above have dissappeared... Exchanged for another or a new one ...
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