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Sony KDL-32L4000 LCD issues

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    #1

    Sony KDL-32L4000 LCD issues

    I am having an issue with this LCD TV. The picture is rolling like there is no horizontal hold. I have reflowed the T-Con and the tuner board with no success. I am thinking of replacing all the power supply caps next. Any idea what may be causing this and the best way to fix it? Thanks in advance.
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    #2
    Re: Sony KDL-32L4000 LCD issues

    I have never ran into this problem before. I cant see the caps on inverter board as being the problem though. Have you checked to see if it does this on a different source input? (Component, HDMI, etc...)
    The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

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      #3
      Re: Sony KDL-32L4000 LCD issues

      It does it on all inputs. Really it's just the main image and a ghost of it rolling. That is why I was thinking it may be a power supply issue.

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        #4
        Re: Sony KDL-32L4000 LCD issues

        Does the rolling or ghosting happen on the entire screen, or is it limited to certain sections?

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          #5
          Re: Sony KDL-32L4000 LCD issues

          Happens on the whole screen.

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            #6
            Re: Sony KDL-32L4000 LCD issues

            I'm just throwing this out there. Oviously the high voltages for the lamps are working however, does anyone out there think that excessive ripple on the output to the processor board can possibly cause these symptoms? What is the name and numbers that appear on the main processor chip located on the processor board? I have a feeling one of the inputs have something to do with sync.
            The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

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              #7
              Re: Sony KDL-32L4000 LCD issues

              Originally posted by Dgtech View Post
              I'm just throwing this out there. Oviously the high voltages for the lamps are working however, does anyone out there think that excessive ripple on the output to the processor board can possibly cause these symptoms? What is the name and numbers that appear on the main processor chip located on the processor board? I have a feeling one of the inputs have something to do with sync.
              It does sound like it could be a bad (noisy) LDO regulator.

              PlainBill
              For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

              Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

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                #8
                Re: Sony KDL-32L4000 LCD issues

                Deranged, did you ever find a solution to this problem? I know someone with that same problem but on a different set. It was like the screen was not updating quick enough and the picture would slowly clear off of the screen from right to left. I have seen this on his youtube video and I'm inclined to say it is the main video processing board.
                The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

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                  #9
                  Re: Sony KDL-32L4000 LCD issues

                  i have never worked on a tv but if the same thing applies i vote it the cpu (does it have one)? is overheating and underclocking itself?

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