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No picture on Samsung plasma (audio present, remote works) green LED flashing on back


\015 While watching TV the screen suddenly went off. I could still hear the audio on my receiver, so not totally dead.\012\012Unplugged for overnight, did not help. The TV responds to remote when I try to change the channels, power it on, change sources etc I can hear the audio changing.\012\012There is a green LED (LED2000) flashing on the back. Another LED (LED5001) is steady. What could be the problem? This is Samsung PN50B860. Thanks.\015

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