My Battery is loose, perhaps I need to stick it back down with some double sided tape.. Perhaps it’s moving the battery that fixes it. Or there’s some sort of protection circuit that stops the battery from charging, as the iPhone thinks it’s broken?
I have this same problem. My rotation doesn't work after a while. But I can fix it by restarting my iPhone.. I'm jailbroken though so unsure if it's a tweak making it malfunction overtime.. no idea what causes it to get stuck honestly..
iPhone 6's home button has nothing to do with the screen. It's completely separate, the cable too I believe. What exactly did you replace? The button? Or the daughter-board beneath the button? https://d3nevzfk7ii3be.cloudfront.net/ig... If the button still works, but only "10%" of the time, sounds like it's simply dirty where the connection bridges. If you can get to the mechanical switch (the clicky thing where the home button presses) when you take your phone apart, put a couple drops of isopropyl on to it (no less than 90%, 100% is best) and click it rapidly around 50 times. Add another drop, click again. Then reassemble the phone.
Is that thing battery operated? I'd assume the battery is simply losing its capacity, thus it's not as powerful as it was when first purchased. If it's corded and plugged into the wall, perhaps the electric engine needs a greasing. ;x
Faulty battery, buy a new one. Just know your phone is 4 years old and no longer in production, so the batteries aren't either and most likely the ones you buy are cheap knockoffs, or the real deal that haven't been charged in 3-4 years.