My Samsung 65KS8000 has developed this annoying line on the right-hand side of the screen (see image). It is only about 1-2 inches long but it is visible and annoying at normal viewing distance. Anyone know if this likely to be easily repairable? I have a six-year guarantee from Richer Sounds, but I don't know what that will get me as the TV is only a few months off six years old. Thanks for any input.