My LG 26LH20 turns itseld off after about 2-3 seconds. TV is a little over 1 yr old. I t happened about 2 months ago and I thought it was the cable. had cable serviced, not the problem. now it's happeneing again. HELP!

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Tv turn itself off after 2-3 seconds the tv still audio voices?Yes,than the tv long board that call the LCD inverter board it is dead.Require change the tv long LCD inverter board,this board help the LCD screen panel to have a backlight to produced a picture or 2-3 seconds tv power died completely no power to tv all?Yes,than this problems the tv power supply board it is dying.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board or the tv power supply board for the replacement.