Other than this our new TV is amazing, but this noise is threatening to drive me mad. I've looked at the other support advice and they suggest either going Home -> Settings -> Sounds -> Key Tone -> Off or -> System Sounds -> Off, but this TV has neither of those options, not even under Advanced Settings. In desperation I've looked in everything, including Eco "just in case"!
The most head-scratching part of it is it even does it when I change channels on the TiVo box, which is connected to the TV through the HDMI port.
Help?
