read the postings about the buzzing from the power supply to the Hitachi 42pd5200 but decided to get one from NexNix anyway coz I thought it might not be that bad. Switched it on - seemed OK. Put a video signal thru it and the noise level seemed to increase. It also changes frequency (and possibly amplitude) depending on the video signal - maybe to do with bright scenes?? What is deemed to be an acceptable noise level? and how can I measure this? It's a lovely piece of kit so I don't really want to send it back. Thanks Stuart Smith p.s. how do I switch the ALIS thingy off? Can't find it on the menu.