My 55 inch Samsung KS9000 TV randomly started showing vertical lines and shadowing on all inputs. I was somewhat surprised as I own 4 Samsung TVs. Three of which look as good as day one and are older than my KS9000. I have been an exclusive Samsung TV owner and have always felt that the Samsung name meant quality. So, I am disappointed that this TV is starting to fail only after 3-4 years. I hope there is a solution/fix for this issue.
Does the line appear on all sources including the picture test? Can you send me a private message with pictures of the symptoms you're experiencing? http://bit.ly/2tCGnGK