Re: my iPhone 6 will not turn on after turning off all by itself
Why did it go off to begin with? Was it battery down to zero and you let it cut off? It should turn on as soon as you plug it in to charge it and if not I would suggest calling your local Apple store or Apple to set up a genius bar appt.
Re: my iPhone 6 will not turn on after turning off all by itself
If you've tried rebooting the device, changing the power cord and using a different outlet, you may need to make a Genius Bar appointment with the nearest Apple Store.
i had the same issue with my phone, no matter what i tried to do ro turn it on ie hard reset it wouldnt turn on and even the apple genius coulnt turn the phone back on. they ended up replacing the phone for me
most likely the battery drained out you need a new replacement because the main components basically burned out so that phone is done. same thing happened to my galaxy 4 and iphone 6 apparently. it does that once the phone gets way too hot often