Phone doesnt charge, although charging symbol appears

Hey guys,

I have a Nexus 5X that from one moment to another simply doesnt charge anymore. I really have no idea, how this happened.

What I have tested so far:

-Different USB-C charger cables

-Different USB-C chargers

-Replacing the battery

-Connecting it to the PC to see if i get a connection.

In all cases, the charging symbol appears,but the battery just wont load. I can also without a problem, connect the phone to the PC and copy data to or from the phone..

So what exactly is broken here?