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Now the tv is turn on,tv have power LED light indicaton but no picture?Still have a clicking sound but no picture on the tv LCD screen panel?Yes,than the tv Tuner signal board that the other board 70% also might have the problems too.That the board where the incomming broadcasting signal cable plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish tv Tuner signal board for the replacement.
At least the 5VDC stand by power supply is working, there will be a control signal pin from the mainboard to the power supply board to turn on the rest of the power supplies (24vdc for the back light inverter boards, 12vdc for other circuits). Any bulging caps in the power supply?