TB16 Docking Station Ethernet port is not working on Precision 5520 either Thunderbolt 3

Hello,

I am having issues connecting to Ethernet port on TB16 Docking Station, it gave me an error message of cable unplugged (I used different cables). I am running Windows 10 1709, I have tested this docking with other Precision 5520 and it worked fine.

I am also trying to use a Mac monitor with a USB-C to Thunderbolt adapter and it is not working when connected to the TB16. I tested connected directly to the laptop with the same adapter and it worked.

Drivers updated

Firmware updated

Dell Troubleshooting tools applied

Microsoft Troubleshooting tools applied

Could you please help me?

Thanks in advance,

Oscar