M3s back function dead and sudden reboots

1625

7

2017-03-02 07:54

Good morning gentlemen! I come straight to the point.
Out of the blue button on the problem it occurred in this spectacular device. Hoping for a software resolution I: reset to factory data, downgraded to 5.1.5.3G making clear date and reinstalled the 5.1.11.0G (always clear date and always following the guides recommended by you).
Unfortunately, the button works only to the limit which makes me think ultimately it's a hardware problem. In addition, however, I noticed the sudden shutdowns that tend to lock the phone, I am therefore forced to force a restart by pressing the combination of power + volume.


It may be a problem related to the button?