pakman0,
Pictures always help, but even in this case, there doesn't seem to be a lot I can suggest if it's happening on all inputs and the reset was performed. You might call 800-SAMSUNG and see if you can have your unit inspected.
--HDTech
Hi - my ln46a750 is about a year old and last few days I am seeing a problem with the screen. Basically the right side of the screen has some echo (that's the best way I can describe it), its not all over the screen but just on the right half. I see it when I turn the TV on, its there for about 5 minutes and then it goes away. I have tried to play with all the settings but its not a setting issue. I have even set it back to factory and still see it. I also see 3 (maybe 2) horizontal lines on the screen. The echo seems to be coming from the lines. The lines and the echo both go away after approx. 5 minutes. The TV is mounted on my wall since I got it, so its not damaged.
I can take a picture of the echo if it will help. Any help would be greatly appreciated
thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic