Hello, I recently bought a HDMI 2.0 adapter, with HDMI as Output and USB C as input.
Picture of my devices; https://i.imgur.com/VAcA0hF.jpg
When I put the adapter HDMI into my monitor, then put the USB C cable into it, and with USB C cable end, nothing happens at all. It usually works for other types of HDMI, just no picture coming here.
Hey I had this problem with my external portable monitor.
What kind of USB x cable are you using you vent use a normal one as it doesn’t transfer data at the speed enssecsry you might need to buy a USB c thunderbolt 3 cable which is designed for this.
Try to take it to the store and give it a try there if they let you borrow the cord.