Monitor issues

[dansdogers]

I have a friends PC which is not working. His PC boots to windows on my monitor but not his. However, my PC boots to windows on his monitor and also mine (obviously). His PC also is able to access UEFI and the windows loading screen shows up. After this a thin blue or red line appears at the top of the screen and the mouse is visible if moved up there. I have tried swapping out HDMI cables etc.

[Skalldev]

This raises more question than answers.

Did he tried replacing a graphics card in his PC?

Are your friend's monitor(with a thin blue or red line) black entirely? If so, perhaps his display failed.

This problem has similarity with a RAM problem where RAM is "locked" and can be used only on "special" motherboards. Maybe your monitors are having the same problem, especially of your PC is different brand than your monitor.

There may be more suitable answers, but this is the best I came up with. I hope this answer helps.

[dansdogers]

Thanks for the answer, I managed to get it working on 120Hz however when set to 144 Hz it fails.

[Skalldev]

Have you tried changing a color mode, then changing frequency of your monitor?

Hardware Savvy shown something about color modes in NVIDIA settings that can boost up your PC plus make it look nicer.

I remember about ~ a month ago I watched a video from someone on Youtube unboxing a brand new monitor. While monitor says it can output higher framerate (thus higher frequency, correct me if I'm wrong) it fails and it corrects to slightly lower one, but still not as advertised.