So, I've just got this monitor today. Absolutely love the look of it and performs brilliant. However, just had this issue. Then gone back to normal.
I was playing a custom on dota then all of a sudden the screen like had a grey layer over it with criss cross patterns everywhere. I think it happens every 30 minutes or so as it's happened again so plugged old monitor back in.
Can't really tell in pictures but it was much more clear in person.
http://i.imgur.com/4kbkL7i.jpg [1]
http://i.imgur.com/SG4FRJI.jpg [2]
Any help is much appreciated.