Flickering screen on UN65KS8500FXZA was my original message, which has since been deleted.
My TV was just over 2 years old, and suddenly started flickering, shimmying and turning on and off by itself. My guess was that it has to be a software issue.
I have replaced the main board and the power board (I have PC experiance) but that did not solve the issue. Has anyone come up with a fix for this?