Sharp AQUOS LC-42D85U tvgos does not work and hasn't worked for several months. What is the problem?

What is ur tv problem?No tv power LED light incation all or power LED light indication an OPC LED lights indication flashing togethers?Tries tv unplug,replug it back like about an hour later,for the tv to do a whole resetting.Tv might work again.Tv still have no pwer all?Yes.The tv power supply board it is dead,that the board where the power a/c cord plug into it.If the tv have both power LED and OPC LEDS lights blinks together.The tv main board Tuner signal board it is the cause and the problems it is dead.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board or a main Tuner signal board for the replacement.