le26r74bd annoying fault!

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  • charlierfc
    Senior Member
    • Mar 2013
    • 93
    • scotland
    #1

    le26r74bd annoying fault!

    Hi all, how are you doing?

    Ok, i picked up this samsung lcd tv, the tv was stuck on stand by. now i cant remember if it had a stand by light to start with, anyhow... i opened tv and i found a buldging capacitor, AND 2 caps poorly replaced wrong way round. i turned these and relplaced the bad cap. now tv has stand by light with a slight flicked, the tv stays in stand by UNLESS the infared board is unplugged the tv comes to life.

    im unsure if person replaced the caps with the proper one, its the caps nearest the av board wire connections. think these onse are known for going bad, i cant see the values on any picture of the psu.
    ill upload in a bit when i come back home.

    any ideas?
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: le26r74bd annoying fault!

      Check the power button on the key button PCB is not stuck down or broken.
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • charlierfc
          Senior Member
          • Mar 2013
          • 93
          • scotland
          #3
          Re: le26r74bd annoying fault!

          i thought thatto,,yrt when you remove the small board and re wire it once tv is on it seems to turn off and on ok with the button that is on the ir board.its a small mounted swithch it seems to click up ok

            Comment

            • charlierfc
              Senior Member
              • Mar 2013
              • 93
              • scotland
              #4
              Re: le26r74bd annoying fault!

              ahh the side ones.....that would perhaps explain the flicker from the led. ill check and come back, if it works ill let others know

                Comment

                • charlierfc
                  Senior Member
                  • Mar 2013
                  • 93
                  • scotland
                  #5
                  Re: le26r74bd annoying fault!

                  no, wasnt that.even with the side keys disconected the led still flickers slightly, the keys all work as does the front power key. only when the ir board with the led on it is connected the tv wont fire up, would the small led drain the power for the 'on' signal?

                    Comment

                    • Caleb
                      Smokin IC's
                      • Feb 2013
                      • 645
                      • USA
                      #6
                      Re: le26r74bd annoying fault!

                      perhaps a shorted mlcc on the ir board is dragging down the voltage? Ohms test across the voltage rails of the ir board should tell the tale, also a voltage test with the ir board plugged and unplugged would be helpful.
                      Liberating magic smoke one part at a time

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