I have a Pioneer 434 and have always had a couple of niggles regarding the fan & quiet screen buzz. I have got used to it but wonder.... 1. fan - is it me or does it get louder after set has been turned on a while, any advise on how to turn it down a bit ? 2. Buzz - do all plasmas buzz a little ? To be honest I never noticed until I went looking for it after reading all notices on the forum ! I can only hear it when I stick my ear close to the screen or when the TV is on mute..... Am I becoming paranoid ?