Can you try the screen with another computer? It may be your graphics card that is failing. The cost of investigation and repair may well be more than a new moniter. It would be worth an email to Samsung support to ask if they know of the cause.
This thread is now locked and can not be replied to.
Sniper Elite 4 review: Headshotting Nazis has never felt so good
1995-2015: How technology has changed the world in 20 years
The Fresh New Fonts of 2017
WWDC 2017 dates: How to get WWDC 2017 tickets, when is WWDC 2017 and more details announced