A:
Plasma TVs do not operate properly at approximately 6500 feet (1950 meters) or above. If you attempt to operate a Plasma TV above or near that altitude, it will buzz very loudly. Unfortunately, there is no way to stop the buzzing at that altitude. However, the loud buzzing should stop when you operate the TV below 6500 feet.
If your Plasma TV makes a buzzing sound when it is turned on, this is normal. It's caused by the electrical charges that are used to power the pixels that create the images on the screen. The buzzing, however, should not be so loud that you can hear it when the volume on the TV is set at normal levels.
If your Plasma TV is buzzing loudly, follow these steps:
1. Set the volume of the TV to the setting you normally use.
2. Stand 10-15 feet away. If you do not hear the buzz, your Plasma TV is working normally.
3. If you continue to hear a loud buzz when you are 10-15 feet from the TV, return to the TV and see if any cables are resting against the metal back cover of the TV. If cables are resting against the back panel, reposition them so that they do not rest against the back panel and check if buzzing has been reduced.
4.If repositioning the cables does not reduce the buzzing, remove all connection cables from the TV and uplug the TV for about 30 seconds.
5. Plug the TV's power cord back into the power outlet in the WALL; not a power strip, and turn it on without anything connected.
If you continue to have an issue with buzzing, please contact The Geek Squad or Samsung Support.
-MrSamsung