Chosen Solution
I replaced a charging port on iphone 8plus. Was very careful when taking everything apart, put everything back together and tested the charging port,and it was fine. Charging port worked. Started testing the screen and when I pressed home, it made this crazy beep sound and would sometimes restart itself afterwards. Some presses, the button doesnt make the noise, most presses it does. Some presses it makes the noise and then restarts immediately after. I dont know whats going on. iOS is up to date. Everything seems completely fine. No screw mixups, no static discharges, no punctures or drops. The phone also did NOT do this before changing the charge port. PLEASE this is not my phone this is someone elses and i need to fix it asap or they have to get it replaced. I have no found any answers anywhere on this issue.
Since you have the charge port working, make sure the battery has a charge and replace the charge port again with the old not working one (I know it’s not ideal) and if it doesnt make that noise then its the new charge port causing some ground or short.
the flex from the vibrate are pretty flimsy and easy to tear, I would inspect this closely, also check that the charge flex is seated correctly. To check the new charge flex isn’t the problem, temporeraly attach the vibrate to the old flex and hang it in the phone to check the vibrate works as it should or not.
Hey man idk if this helps but I have iPhone 8 Plus as well and I just woke up and I tapped the home button and it kept beeping but I just powered off my phone then turned it on and now it’s doesn’t make the noise
