kinda sounds like one of two things from my experience with the iphone 8.
1) most common issue; is a damaged Proximity Flex. Try replacing this part, and see if it fixes at least your booting problem.
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2) Board Damage by the battery connector; very commonly on home repairs, a localized Filter is damaged near the battery, which causes resets, as well as being unable to process the battery.
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#EDIT#
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@refectio followed up with a great image to help you find this damage. i suggest taking a look at it.
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2) Board Damage by the battery connector; very commonly on home repairs, a localized Filter is damaged near the battery, which causes resets, as well as being unable to process the battery. (#EDIT# @refectio followed up with a great image to help you find this damage. i suggest taking a look at it.)
These are the most COMMON reasons this will happen. however, you can also have an issue with the Charge port PBA, or a problem in the board not quite as noticable as physical damage.
kinda sounds like one of two things from my experience with the iphone 8.
1) most common issue; is a damaged Proximity Flex. Try replacing this part, and see if it fixes at least your booting problem.
2) Board Damage by the battery connector; very commonly on home repairs, a localized Filter is damaged near the battery, which causes resets, as well as being unable to process the battery.
+
#EDIT#
+
@refectio followed up with a great image to help you find this damage. i suggest taking a look at it.
These are the most COMMON reasons this will happen. however, you can also have an issue with the Charge port PBA, or a problem in the board not quite as noticable as physical damage.
kinda sounds like one of two things from my experience with the iphone 8.
1) most common issue; is a damaged Proximity Flex. Try replacing this part, and see if it fixes at least your booting problem.
2) Board Damage by the battery connector; very commonly on home repairs, a localized Filter is damaged near the battery, which causes resets, as well as being unable to process the battery.
These are the most COMMON reasons this will happen. however, you can also have an issue with the Charge port PBA, or a problem in the board not quite as noticable as physical damage.