I've never owned or even known anyone who owned a plasma, so I don't have any background knowledge of them. That said, is the level of interference my plasma has normal? While it's an old plasma, a Panasonic TH-42PW5, it seems to have been well-taken care of, and has roughly 12,000 hours on it (I believe the life rating for it is 60,000? Being made in 2002 I'd say 12,000 is pretty good).
Here are two pictures, both using the S-Video input on the back, that exemplify the problem I'm having really well-http://i.imgur.com/teLHwDq.jpghttp://i.imgur.com/II1HtvA.jpg
The first shows off basically a worst-case scenario- I've got an N64 plugged straight into the display, with the cord plugged in from the front rather than being routed through the back, and help up next to the top right of the display. This is just to show off the interference pattern as clearly as possible. It's a series of bands that start thicker at the bottom and get thinner as they go up to the top. It should be noted that changing the contrast on the display makes the bands thicker or thinner.
The second is the cord routed through the back. The pattern is less noticeable, but still there, and visible from a normal viewing distance. The cord setup is as ideal as possible, I don't know how to improve it any further. Both the N64 and the Plasma are the sole devices plugged into 2 different outlets, and in the case of the TV the outlet was just replaced with a brand new one. It also affects my Xbox, Wii, and PS2 through component input, but I haven't noticed it through composite(probably just the low quality and blending of composite hides it).
Anybody know how I can further reduce or eliminate this interference? Is this somewhat common for plasmas, at least older ones? I know they interfere with radios and stuff, but I wouldn't imagine they'd be that poorly shielded that they can't sit in an average home without gross lines crossing the screen. Any help is appreciated!