08-21-2017 01:55 PM
Have you tried resetting it? Holding the power button down for 20-30 secs. normally does it, but there have been stubborn cases where it has been reported that it took around a minute.
Do this with the unit ON. It may shut off before the prescribed time, but continue to hold the power button down for the full count. Release, then press the power button momentarily to turn it back on as you normally do.