New build, colours inverting?

Just built a PC and getting something a little strange, every hour or so the colours are inverting?

This can be fixed by pulling out the HDMI from the monitor or GPU, or right clicking on desktop and changing the resolution?

The TV I'm using only has HDMI, so cant test to see if I am getting the same issue through the DVI or DP

Have a R9 270 running the latest drivers..


Test the new PC with your 7850 - if you still have it?

Already given that away :( 

Only other card I have is a GTX 260, and that dosn't have HDMI