iPhone 8 Plus home button not working after repair

Level 0 (DIYer) Where do I start with this Repair?

So I have an 8+ that I replaced the screen on to sell. After reassembling everything worked fine. Then I decided to reset all settings and data and when it booted up touch id and the home button stopped working.

Anything I can do?

Edit: Just restored to 13.7 and it says the home button may need service. Don't understand how it's hardware when it worked before I reset.

Posted Sep 8, 2020, 8:30 PM UTC · edited

16
SpiritualCricket•

Very briefly, HB/Touch ID data gets routed via the screen. Bad screen = potential for HB failure. Try with your old screen as the first troubleshooting step.

2
GregDaGamerOP•

I tried with both screens and it still doesn't work. I noticed the smaller of the display connectors so maybe it's that

1
SpiritualCricket•

If the HB isn't working with either screen, you've damaged either the HB flex itself or the female FPC connector on the logic board.

The HB flex is very delicate and easy to damage. There is a screw that goes through the metal bracket into the back of the HB. Did you ensure this was the 1.2mm Y000 screw? This screw should be very lightly torqued, too.

Any pry damage on the HB flex from when you seperated it from the old screen? Check for scratches. Any minor tears to the flex?

1
GregDaGamerOP•

Ok, I've chcked that the home button flex isn't damaged (at least visibly I can't see anything). I also did have the right screw as it was laid out.

As for the logic board I looked and couldn't see any bent pins or anything if that's what you mean.

1
OkRaiden•

Put home button back on old screen. If home button work then new screen has issue or tear been damage on flex. If old screen home button still won’t work. You may have damage the home button flex. Or logicboard has a small component lift. Good luck.

2
one-nil•

Ensure the front camera flex is plugged in the correct way around as this seems to stop the home button working altogether.

1