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TH-42PX80U 10 Blinks

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    #1

    TH-42PX80U 10 Blinks

    My friend gave me this tv to repair. I know there was a problem with the psu. I replaced the fuses, the bridge rectifier, the 10 ohm ceramic resistor, and the problematic gate. After I did that the fuses never popped but the tv never lights up. I used the troubleshooting manual for a 42pz80u since that's all I had. So it told me before it shuts down do I have 15v on pins 7,8,9 on p6 and I did. I unplugged a1, a11, and a52 and I still received the same blinks and it still shut down. I'm sure it's still the power supply since I don't get any blinks on the sc or ss boards but the troubleshooting guide points to the a board. Ideas?
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    #2
    Re: TH-42PX80U 10 Blinks

    U said u replaced the fuse, rectifier, ceramic resistor, and power mosfet. Only thing left to do is inspect/change the 3 power diodes.

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      #3
      Re: TH-42PX80U 10 Blinks

      The three power diodes are reading normal. No shorts. This one has me stumped. I have metered almost everything on the board.

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        #4
        Re: TH-42PX80U 10 Blinks

        I will have to check but I'm pretty sure i have a fully functioning one sitting here.
        If I do,I'm more then willing to use it as a test pilot for yours. test voltages,values and what not. Will let you know tomorrow if I do indeed have one.
        Proud owner of dozens of broken TV's and many,many,many boards.


        Our website and passion:http://hollenhundshepherds.com/

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          #5
          Re: TH-42PX80U 10 Blinks

          Thank you Martino. I know I'm not getting any voltage going to the SS or SC boards. But I know I get 15v on pins 7,8,9.

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            #6
            Re: TH-42PX80U 10 Blinks

            Double check the components again?

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              #7
              Re: TH-42PX80U 10 Blinks

              I was mistaken, I appear to not have one of these.
              Proud owner of dozens of broken TV's and many,many,many boards.


              Our website and passion:http://hollenhundshepherds.com/

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                #8
                Re: TH-42PX80U 10 Blinks

                I have just been reading a few threads on the internet a lot of people who have the 10 blink issue have found its a mainboard issue not a power supply issue.
                Not sure but maybe the 11th generation training manual will help?
                Last edited by vinceroger69; 12-01-2016, 06:54 AM.

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                  #9
                  Re: TH-42PX80U 10 Blinks

                  The OP said the fuse blew on the power supply before replacing it.

                  What part did you replace the power mosfet with? original?
                  Are the ribbon cables seated correctly when you re-assembled?

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                    #10
                    Re: TH-42PX80U 10 Blinks

                    may of been a victim of a lightening strike/power surge and damaged both boards?

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