Chosen Solution
Hi, The power button of my iPhone SE (2016) stopped working 2 weeks ago, out of nowhere. No shock or anything. The phone had never been opened. I checked the software, hard reseted, updated, reinitialized, nothing fixed it. It was time to fix the hardware. I ordered a new flex cable and changed it. Didn’t work either… Just to be sure I didn’t break the flex cable while replacing it, I got another one. Before replacing it again, I checked first if the button worked just by connecting the flex cable and pressing the button. It worked! So I took the time to replace it again, and it worked once the phone closed. Sadly, there is a next. A week later, not working again! Out of curiosity, I just connected the flex cable I thought I had broken, and the button works!! So I suppose the flex cable in the phone works as well, and the problem is somewhere else I noticed that when the button doesn’t work, I can’t turn off/on the phone. When I try to turn it off, it turns on right away and got stuck in an infinite boot loop until I connect it to a lightning cable Any idea what’s going on!? When the flex is in the phone, it doesn’t work, or for just a few daysWhen the flex is connected on the fly, it does workInfinite starting loop when the button doesn’t work Thanks
Some pins on power button connector have been shorted to ground so when the whole button shorted to ground(broken) causes loop why? Because power button is connected to pp_1v8_always(main power supply to boot a phone) and power button acts as a trigger signal,so if it shorted CPU will do loop because PP_1V8_ALWAYS is shorted Try to measure diode value on power button
