S2716DG, white horizontal lines, #3

Hello.

Trying to find out how to get in touch with support is proving difficult at best, so trying my luck here.

My screen have started to show a horizontal line that I can't figure out what is, it's present on all the test screens except the black one. My camera can't focus well enough to show it on the colored screens but it is there.

I have tried changing display cable, trying on another pc, switched to HDMI, tried different resolutions and refresh rates to no avail.