My Samsung LN-S4095D 40-Inch 1080p LCD HDTV, purchased in 2007, has started to show 3 "columns" of white dots or pixels running vertically up the screen. I initially thought (hoped) it was my Comcast HD DVR box but I am noticing the dots or pixels when I play DVDs but only on the right side of screen. No clue where to begin to troubleshoot this and fix it. I read in other threads about the white dot issue with a chip replacement to fix it but not sure if my dilemma is the same. any feedback is greatly appreciated!