Strange buzzing sound----Toshiba 39L1350U LED TV

I just purchased a Toshiba 39L1350U LED TV and when I turn on the power a strange buzzing sounds appears and does not go away. The sound is not coming from the speakers. The sound is louder at the back side of the tv. Any information on this issue or how to make the sound go away would be greatly appreciated.

Try plugging TV into another outlet to verify interference from other appliances.  Also, try turning off any floursecent or curly bulbs.
Lawrence

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