Is there can be some non-user-accessible settings inside the set. Call it in and ask about drive voltages that a tech can tune up as well as color calibration services.
Bob
Is there a fix for this & what causes it? This is a 55" 3d Samsung plasma that's ~4 years old.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic