My HTC One M9 was on then turned its self off, and won't turn on, what can I do?

[AC Question]

my htc one m9 was on then turned its self off, and wont turn on, what can i do?

i have tried holding the power and top volume button but nothing.

 

[the tall guy]

Re: my htc one m9 was on then turned its self off, and wont turn on, what can i do?

Hi, silly question but is the phone fully charged?

have you dropped it recently or has it had any water damage?