Why is my phone not turning on, and when I try to hard boot it still doesn't turn on?

[AC Question]

So one week, after I hadn't used my rooted Huawei for 2 days (which during that period it was shut down)I decided to boot it for a steam confirmation it decided to do nothing. I tried hard booting it, this resulted in it buzzing at me until I held down the power button for a nice long 15 seconds (ish). It hasn't booted once since that day. Please help!
Edit: I have tried booting it into safe mode: However this results in nothing.

 

[Rukbat]

Sounds like water damage (which could also be from condensation inside the phone). ("Hard booting" is turning the phone on, nothing more.)