Chosen Solution
After battery change I don’t have power off on screen , Siri and people calling me hear only a few words and last my reverse camera doesn’t work .
assuming you got the battery from a reputable source, and not ebay, or the like, then i would suggest opening the device, and making sure your screen flex cables dont have any knicks or tears in them, that the board was not scratched in any way, and that metal tools didnt short out any components. Failure 1) “No power off screen” -This can be caused by software, Faulty power button, Shorts on the board, Water Damage, Or phyisical damage from mishandling. Failure 2) “Only hearing a few words” -This can be caused by Software, Muffled Microphone, Faulty Mic Flex, Shorts on Board, Water Damage, or Physical Damage from mishandling Failure 3) “Reverse camera not working” -This can be caused by Software, Failing camera, Shorts on board, Water Damage, or Physical Damage from mishandling.
