I have been battling a random 'wave/trickle' on my plasma screen for the last six weeks. I tried all the typical solutions - in line filters for cable box, isolating the ground on the plasma (I know, bad idea - didn't help so I removed the 'cheater' plug), checked all connections, etc. etc. I even posted on this forum looking for advice and nothing seemed to help. Then yesterday, I emailed my problem to a high end audio/video store here in Houston and to my shock, they actually called me to discuss even though I had not bought anything from them. After a couple minutes of talking, the store guy asked if I had a light dimmer...I told him I installed one for the recessed lights and a ceiling fan controller a while back - not sure when, but seems to be around when I started seeing the wave. He said take them out and that this happens all the time. Well, I disconnected both of them last night (not just turned off, but took off one lead from the switch after throwing breaker of course) and it solved the problem 95%!! Only one wave in three hours...then I remembered I also installed a dimmer in the dining room...open floorplan with living room and dining room the same. He said today to disconnect it as well and that should do it. Has anyone ever heard of anything like this and have I really solved the problem or maybe last night was just a 'good' night for my system???