This problem definitely sounds like something that may need to be serviced. Please contact us on Facebook or Twitter at this link: http://forums.cnet.com/7723-13973_102-542437/service-issues-click-here-for-help/
Be sure to mention that you have tried more than one video source when you contact us through one of those channels. That'll help them narrow down the issue more quickly, and then we'll definitely be able to get you in contact with a local service provider.
-- HD Tech
I have a Samsung PN58C8000 Plasma TV that has developed a video "banding" problem. When the background is mostly white, there are large horizontal bands of red or pink, that appear. The bands are mainly from the middle to the top of the screen, and somewhat "transparent". When this happens, the bands sort of flash, or flutter. This happens on all inputs. I see the "banding" when watching hockey games, and any time the majority of the background is white. The TV is just out of warranty now, even with the 3 month extended warranty. Does anyone know of a fix for this problem? Except for the banding problem, this TV has a great picture and I would be willing to pay to have the banding problem fixed. If anyone else has had this problem and had it successfully repaired please let me know. Thanks!