my HTC One off after battery was completely low, now it can't charge and can't even turn on. what

[AC Question]

Can't turn it on or charge, I have tried holding the power button together with volume down button, But nothing seems to work out for me.

 

[B. Diddy]

Welcome to Android Central! Let it charge on a wall outlet for at least 4-6 hrs undisturbed. Then try powering on.