I have a ***SAMSUNG 46” TV MODEL# LN46C630 manufactured***
***April 2010. Has a really crisp picture, so I don't want to replace it. The vertical color lines started appearing and a light smack on the back of TV would clear it up for a short while. I thought It must be a loose connection.After removing the back cover all cables were connected solid. No evidences of burned out computer boards parts. I did notice the LCD screen was very hot. ++Solution; put a small fan on uncovered back of unit. That was three days ago and I have had no more vertical line problems.++***
***Replace cover and place fan blowing on lower air vent holes. LCD Screen is running much cooler and no vertical lines have appeared in five days. Hope this solution for my TV will help someone else. Bill H.***