Why I ask is this sounds like an issue Samsung is covering OOW (out of warranty.) I do not have access to the list of models affected but if you don't call you may not know if they will do the usual fix for you.
I have read folk fixing it themselves but I can't tell if it's this issue or not.
I am having issues with my screen there are vertical lines across the screen (from top to bottom) when I switch the TV on the lines stay there for roughly 5 mins and then screen just trends to flicker afterwards. Samsung not great help either under 2 year's old very frustrating can someone help please?