Chosen Solution
Because I am new to repairing small electronics, I was bound to make a mistake just replacing my iPhone 7’s bent housing. This problem did not exist before replacing the housing, so I am wondering what is causing my phone to boot loop until either the battery completely drains itself out, force shutting down the phone via holding only the power button, or disconnecting the battery. My hypothesis that something went wrong to the logic board when connecting the flex cables for the screen, and that microsoldering may be the only way to fix the problem. This is because recovery mode worked when the phone was plugged to a PC, but the PC cannot communicate to the phone whatsoever, meaning the dock connector isn’t the problem. Though this is a assumption, I assume the problem is within the components in the logic board.
Bent housing might imply flexed board that may bring to a number of issues, including audio IC and baseband IC but doesn’t exclude a number of things. iPhone 7 are a pain in the … (insert your fav. part here) when it comes to bootlooping as they can get mad for a bad dock, a faulty front camera, a bad home button, plus board issues. You can try removing the logic board from the housing, plug in a known good dock, battery and a screen and plug in the lightning cable and see what happens with bare minimum. If bootloops persists, remove screen too and plug it into a PC to see if it boots. If bootloop stops plug back parts one by one until you find the culprit.
I wouldn’t expect the board to get damaged during a housing swap. This sounds like a battery problem. Try a known good battery and let us know the results.
That is the loose connection of SWI line of battery to battery connector,Try good connection between battery connector & battery,If the same change the new battery and check.
Is power and volume flex button iphone 7 the same as iphone 8 or it has differences
