HDMI Port on USB C Docking Station Not Working for External Display on Elitebook 850 G6

[User17832]

I am using this Mokin Docking Station below and the HDMI and VGA ports do not work for using an external display. The USB ports and everything else works on the docking station. Everything works on this docking station on a different laptop, what is causing the issue for using an external display on my Elitebook 850 G6?

Amazon.com: USB C Docking Station Dual Monitor, MOKiN Laptop Docking Station with 2 HDMI, VGA, 3 USB...

I have updated all the drivers using HP Support Assistant Program and checked the thunderbolt port security settings in the bios. I have also downloaded the intel thunderbolt 3 and 4 DCH Driver from Intels website. 

How can I solve this issue so I can use an external display?

[banhien]

@User17832 

All I can say: your machine and your dock are NOT compatible. I know HP USB-C G5 dock is compatible with your HP Elitebook 840 G6

Regards.

[User17832]

It says on there that it is compatible with Elitebook 840 G6, this is an 850 G6 and it has a Thunderbolt 3 port which is exactly what is needed. Every port works on the docking station except HDMI so there is something blocking the display from working. I see no reason why it shouldn't work unless it was made that way to get people to buy a $400 HP USB-C G5 docking station.