D6000 DOCKING STATION not working, only expensive charger

First of all, thanks a lot for looking at this post.

I have 2 D6000 docking station with the same issue.

I connect it to my XPS 9370 (and other computers) and the amber led light turns off, I disconnect the USB c nor USB and it turns amber again.

Power is being transferred by the docking station to the computer.

I tried to update the firmware from version A00 to A04. I is not recognizing it.

I tried to connect the USB c to a mobile phone, the same, no led light but it charges it.

Tried with many computers

Not white light at all.

I don´t have any clues to a possible solution. As I said, both of them are having the same issue.

Thanks a lot in advance.