Hello, this might be pretty late, but I have the same model and I just face that problem!
I turn off mine normally then this morning tried to turn it on and it didnt, it had a battery and everything, tried everything until I disconnected the battery and it turn on, then I turn it off plugged it again and try to turn it on, it didnt… So had to do the trick again and it turn on.[br]
My question is did you fix this problem by changing the battery?? or what did you do?