Laptop does not recognize hdmi on dp cable?

I bought a HDMI cable on Dp so I can connect my laptop with my screen and thus have a second screen support the cable 4k but that can't be the problem why the laptop or the screen does not recognize it so on the screen is always no reception but when I connect laptop with a screen with hdmi cable but it stops with hdmi on dp you do not know why

Hdmi on DisplayPort spins around that does not work with a cable or with the cable you have.

Ok and what should I change so that it works

I can't tell you that, unfortunately, because I have not tried it myself. Why is the monitor still connected to the hdmi is occupied?

PS4