Reason for asking is my new Toshiba 42PW27 isn't. And silent operation was one of the reasons for choosing this display... Basically it is making a buzzing/busy-cricket chirping type noise, that comes and goes and seems to change with the screen intensity. The screen is firmly wall mounted (solid brick) and the noise can be heard over normal level TV (say the news for instance) and is driving us spare. Have taken the unit back and swapped it out to try another, but....ss this normal? Thanks Considered the Hitachi 400 (fans) and the Pioneer MXE (not such good blacks) before choosing the Toshiba.