[rboerner]

Originally Posted by hein.dietmar@gmail.com

I am using this USB C Hub: https://www.ugreen.com/products/ugre...ocking-station

This USB C to HDMI cable for the Studio Display: https://www.amazon.com/dp/B07CL2RHX5...roduct_details

For the Cinema Display I am using this adapter https://www.amazon.com/dp/B072PZN5ZK...roduct_details

and a standard HMDI cable I am using also to connect my iPad to a TV.

The USB-C to HDMI cable you are using can only work in one direction, from a USB-C output to a HDMI input. It will not work in the opposite direction as you are attempting.

The mini-DisplayPort to HDMI adapter you are using can also only work in one direction, from a mini-DisplayPort output to a HDMI input. It will also not work in the opposite direction as you are attempting.

In order for a display to be compatible with the docking station you are using, the display must have either a HDMI video input or a DisplayPort video input.