Help Needed

[enduroracer]

Game has been running super smooth since I upgraded CPU and GPU on max, no issues. Single screen 32" flat.
Over the last few days I'm getting black flashes appearing all the time, have tried updating drivers, back dating them, Vsync on and off in game and in Nvidia settings. Have disabled afterburner, have tried lowering settings, all the way down to medium.
Am now at a loss, it's probably something silly, but can't figure it myself. Any help would be greatly appreciated!

Thanks in advance

Screen also does it when not gaming, not as much but the occasional flash

 

[Stepy]

I used to get "black flashes" sometimes in game and on the desktop , it turned out to be an HDMI lead that wasn`t a good fit, just a thought....

 

[BillyBobSenna]

Are you sure you don't have an overheating problem? Does the frequency of flashes change when you run at lower settings?

 

[enduroracer]

Thought the lead had solved it, but no.
Don't think it's a heat problem as all fans are running and CPU doesn't get overly hot