Main monitor goes purple/pink while 2nd monitor stays fine.

[Amuzie]

I run a dual screen setup with one of the screen connected trough HDMI and the other one DVI. And sometimes (Almost always when starting a youtube video in fullscreen mode) My main monitor (The hdmi one) goes mental. The bottom of the screen is a solid pink/purple and the top is full of pink/purple vertical lines. But my second monitor (The DVI one) is fine with no sign whatsoever. Is this issue because of my graphics card or the hdmi?

Specs:
Proccesor: I7 860 2.8ghz

8GB RAM

Graphics card: AMD radeon r9/hd7900 series 3gb.

motherboard: Gigabyte P55a ud4

OS: Windows 7 64bit

 

[Darkbreeze]

Anytime.