Hello. I had a second monitor 4K with HDR and I sold it. My problem starts after that. Now my desktop randomly goes darker one time a day or something. If I move my cursor, it returns to normal. My current monitor is 1080p without HDR. I think that my computer have settings from my 4K monitor which I sold already and that might be the reason why it's messing with my current desktop. I don't know how to fix it. I tried googling. I checked display settings.