My Zenfone 2 suddenly stop working, can't charge it or turn it on

(Sorry in advance for bad english)

Hello
I have a big problem with my Zenfone 2.
Yesterday, I connected it to my Aukey Powerbank, and suddenly, it stopped working ! I tried everything to turn it on, let it charge for hours, but nothing worked, it's like dead :crying:
So I managed to remove the battery to reset after, but still the same... I don't know what to do.

I really need some help please, I prevently sent a mail to Asus but my Zenfone is out of garranty...

Thanks