I recently bought this model and have an interference problem that I cannot identify. When watching analog cable TV signal I have a white box of interference that keeps running from top to bottom of the screen. I have run this analog TV signal through two turners and two AV amp's and the problems still exists. I get this same interference no matter what I watch through my AV amp (satellite, DVD, Xbox) until I remove the analog cable connection from the back of the amp and then the interference goes away. So the interference is only coming from the analog TV signal. I've chased the analog TV cable all the way back to the outside source removing any/all potential interference points and I have also tried a second cable from source point with no luck. Has anyone come access this type type of interference and know of a gismo/gadget that can elimate it? This interference can only been seen on the plasma - it does not show up on a regular TV. I also get a light hum sound with it through my amp.