Tries tv unplug,replug it back like about an hour later.Tv now will be resetting itself back to the factory setting.Now the tv should be working again.If still have the same result than the tv power supply board is dead.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
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