i have a samsung 46 lcd, 1yr old. The tv makes a noise when its on, i had samsung replace the power board twice and it still does it. i even use the tv with and without a power protector and it still does it. I dont have cable but the tv on will do it or hooked up to xbox or ps3. ill include my youtube link because i dont know how to post links. I think there is something wrong with the tv and am open to any suggestions. the noise is at 04-06