Do you know what PC components you have, as in GPU, Motherboard, CPU, Monitors, PSU etc.? Or what make/model if preassembled (example: HP Elitedesk 800)?
What output are you using? (VGA, HDMI, DVI, DisplayPort, etc.)
Have you tried restarting the PC? It could be a temporary driver glitch/crash.
This post was edited by Arkhen on Nov 2 2017 04:30am