The second monitor does not work, what should I do?

Question

Monitors

Good day, I have a PC and the main monitor, which is connected via Display Port.
I found a monitor on the balcony, I connect it as a second one via HDMI, it does not give any signs of life. Monique checked, connected a TV box to it, there is a picture, checked the cable by connecting it to the main monitor - the flight is normal.
I updated the firewood, but Monica is also not in the device manager. I disconnected everything from the PC, leaving only the "new" monitor, in the same way, by zeros.
Tell me what to do?
Ps I tried a ton of hdmi, by myself
Upd: I tried it via DVI - it works. Connected, as well, to vidyuhi. But still want hdmi

Answer 1

if the port burned - then just fix it

Answer 2

Mother (processor) or video card must support two monitors at once. Xs, probably at the same time either the mother or the video card. One in the mother and one in the video card - probably should not work.