Thank you for posting your question on Just Answer! I will be happy to help you with this problem. Can you please give us some more information so I can better answer your questions.
-What are the lights on the front of the tv doing? -How old is the unit? - Do you have this problem while watching all different devices hooked to this television? (DVD player, cable, satellite, game counsel, etc.)
Please give me this information and I will be happy to assist you further. Thank you, Tim Nolan