I have a JVC tube tv that was showing interference from my unshielded speakers when I placed them next to the set (corners of the tv were turning dark and had a slight hint of red and green). However, after i turned off my tv for the afternoon (leaving tv and speakers exactly where they were with the interference) and returned later that day, the interference was gone when i turned on the tv. Nothing! is this unusual? It's like the tv calibrated itself to account for the megnetic interference. will the interference return? i was going to move my speakers to a different location, but now it looks like they aren't causing any problems. why would this happen? thoughts? Thanks.