Chosen Solution
Hi, I replaced the battery on my iPhone 8 plus and after the replacement all the other buttons work except the power button. The home button works etc and so does everything else on the phone. The iPhone does have warranty (which I did not know as I bough it used) but will apple not help me because there isn’t a genuine apple battery or would they not care?? Thanks in advance!
Are you comfortable enough to open it up again? If so check all the connections to the logic board, make sure nothing is loose or torn on the right side. You could take it to Apple for repair but they’d likely notice the battery and charge you for any repairs.
I suspect you have damaged the power button flex when trying to remove the elastic tape at the top. hang in a new flex to see if the problem is restored.
