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sony kdl-46S4100 dark, no sound, inverter?

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    sony kdl-46S4100 dark, no sound, inverter?

    I have a sony kdl-46S4100 that one day went dark,
    no sound,
    powers on by the remote,
    has a click at power on,
    power light glows steady,
    no backlight that I can see
    no heat detected anywhere
    remote fails to do anything after power on
    no sound, no smell

    Ive been swapping parts from ebay trying one different board at a time

    power supply board - no change
    main board - no change

    I have a salvaged tcon board and inverter board that i have not tried yet.

    Anyone have a beginners troubleshoot algorithm that I can do with a multimeter? Sorry in advance, I'm trying to learn this as I go.

    #2
    Re: sony kdl-46S4100 dark, no sound, inverter?

    Originally posted by Houston1381 View Post
    I have a sony kdl-46S4100 that one day went dark,
    no sound,
    powers on by the remote,
    has a click at power on,
    power light glows steady,
    no backlight that I can see
    no heat detected anywhere
    remote fails to do anything after power on
    no sound, no smell

    Ive been swapping parts from ebay trying one different board at a time

    power supply board - no change
    main board - no change

    I have a salvaged tcon board and inverter board that i have not tried yet.

    Anyone have a beginners troubleshoot algorithm that I can do with a multimeter? Sorry in advance, I'm trying to learn this as I go.
    Blink Code?

    Comment


      #3
      Re: sony kdl-46S4100 dark, no sound, inverter?

      No blinks - this model does not do that

      Comment


        #4
        Re: sony kdl-46S4100 dark, no sound, inverter?

        Originally posted by Houston1381 View Post
        No blinks - this model does not do that
        You are correct. It does not do that.

        Comment


          #5
          Re: sony kdl-46S4100 dark, no sound, inverter?

          Faulty panel or t-con.

          Could be either with this panel.

          check for 12vdc or so at t-con board fuse (very small near plug).

          Grey panel (some backlight trying to get through) could mean no power to t-con.

          Run through inputs with dvd plyer hooked up and listen for audio.

          Just a few ideas for you.

          Comment


            #6
            Re: sony kdl-46S4100 dark, no sound, inverter?

            Solved!

            Thanks to cadiman for the tip - I swapped out the salvaged t-con board and it started working. I am still looking for the fuse in case this one fails too.

            My process was:
            take the back off and look for any bad caps anywhere on the PS or main board - dead end
            research web for known issues -couldnt find any exactly like mine - most had sound or some other first symptom
            swap out power supply with a ps from ebay - dead end
            found another guy on ebay selling the guts of a tv like mine with cracked screen
            swap out main board - dead end
            put all oriiginal parts back in between attempts
            buy a correct screwdriver that loosens really small phillips screws without stripping
            remove tcon board
            jerked out the ribbon cable from the board and tv - then found there was a little tab that popped up that pinched down the cable - luckily I didnt destroy the ribbon
            test
            shout up the stairs that I fixed my tv

            Thanks for the tip and the forum

            Comment


              #7
              Re: sony kdl-46S4100 dark, no sound, inverter?

              You would have better luck using a microscope than any type of eyeglasses to find the fuse on the t-con. should be next to the input plug. The board will be marked F with a number after it like (F101). F for fuse. R for resister , D for diode etc.

              If the fuse is blown on the t-con do not jump it with solder.

              Glad we could help you!

              Comment


                #8
                Re: sony kdl-46S4100 dark, no sound, inverter?

                I also have a sony kdl 46s4100 and have the same exact problems that Houston1381 had. So i tried swapping the t-con board with a salvaged one but nothing happen. I was wondering if someone can please help me.

                Comment

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