LN40A750 July 2008,
I'm sorry to hear that you're having this issue.
Unfortunately, the symptom you're describing could be either the panel or possibly even a board. Without having the unit inspected, it'd be difficult to offer a diagnosis or suggest the next step.
Barely two year old HDTV - has developed vertical lines that move as the bright sources move. The lines go from the source to the top of the screen. Information online it is that it is a bad panel, costing around $800. Last year, this television had the clicking problem with the bad capacitors ($250). Now, this problem with the (mostly) red vertical lines. What do you suggest?