Question Greyscale monitor issue

James1202

Honorable
Sep 8, 2014
29
0
10,530
Good morning all,

I've recently built a new computer and all has gone well but having an issue with my monitor.

When watching videos, using emulators or anything else which isn't full screen, the area that is being used remains full colour and runs fine but the rest of the screen goes into a greyscale colour.

Using any system applications or shortcuts turns the screen back to full colour momentarily and then back to greyscale.

Any idea what could be causing this? Doesn't seem to be causing any issue with the computer but its more annoying than anything.