Hi all, I recently purchased a Panasonic 32LZD81. After setting it up / switching it on I can hear a distracting electrical noise coming from the back of the TV. I can hear a hum and a buzz when I have my ears near the TV. However, on top of that there is a more pronounced buzz, almost like a cricket trapped inside the TV. It's worst when I first turn it on but even after a couple of hours there's still a trace of it. I noticed when cycling through the modes, that it is more severe in 'Cinema' and 'Eco'; 'Dynamic' and 'Normal' aren't as bad. I've already exchanged the TV once but still have the same issue. Does it need to burn in or is there a fault? Interestly, when listening to Sony and Toshiba sets I can hear a hum / slight buzz when my ears are close to the back but not this intrusive, pulsing 'cricket-like' buzz on top of it. Any ideas?