Why my Zenfone 4 max is shutting off when OS start?

[Android Central Question]

I have an Asus Zenfone 4 max (ZC554KL). A couple of days ago I let it drop from about 1 m. It didn't break any visslbe part, but it shutted off and since then, every time I try to turn it on:
1) It turns on the display normally and the Asus and Zenfone logos appear.
2) It begin to load Android OS.
3) It immediatle shows the message "Shutting off", and eventually shut off.

I factory reset it and reinstall the firmware (Version WW-15.2016.1809.412) but the same still happening.

What could be damaged or what else can I do?

 

[B. Diddy]

Welcome to Android Central! Maybe a power connection loosened. I'd bring it to a repair shop.