I have noticed that the television makes a very high pitched noise. You almost can't tell your hearing it until it is turned off. It is kind of like the ringing of the ear in a way. Then When I turn on the DTV box, the sound becomes a little louder and changes frequency. Does anyone know what makes this noise? Is it some kind of electronic buzz? I also noticed that my computer, even while on power save mode, makes a similar annoying high pitch buzzing sound.