I have a similar problem on a Sony TV. they are not actually vertical lines but are repeating elements associated with lighter and coloured areas on the screen. For example, on a mostly dark screen, with the input name showing you will see repeating areas above and or below the text (and lining up with individual letters or brighter/coloured parts of the image. Mine appear mostly at the bottom and creep about one third to half way up the screen (or they become dimmer such that they are not as visible as they get further from the source (test or image on screen). I have cleaned ribbon cables, no luck so far. Thinking it is probably on the BAX board or the