Chosen Solution
I’ve got an iPhone 7 with a cracked screen and wanted to replace it with a new one. After heating up the device and trying for several times, I finally opened the device, and left it that way (I don’t have the new screen yet). Today I picked up the phone, turned it on and noticed that the homebutton and touch ID weren’t working anymore. I have not touched the homebutton or flexcables in any way, as far as I know. Could it have stopped working due to the heat?
If you cracked the button with the heat, or accidentally nicked the cable, there is the possibility of you having broken it. Try reseating the home button connector, next try a new screen. At this point, it is already broken, so it can’t hurt to try. Apple is the only one that can fix the home buttons. Try reseating the screen cables too.
