I have had the problem for about 2 years. I put the TV aside to fix later. Now I guess is later...The menu has the same problem.
The black lines are even across the screen. They are solid top to bottom. It appears more of a video processor problem, I don't think the lines are dead areas. The other thing is the image seems to have a ghost of one section into another.
The lines are evenly spaced across the screen. The black lines are solid top to bottom.