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Sony KP-51WS500 wil not turn on

Hello Guys,
I have had this model for about 6 years. It worked fine until about a
month ago. Every time I turn it on I would hear loud popping/cracking
noise. Last night I was watching the TV and all the sudden it made the
same noise. This time it went completely off. Since then I was unable
to turn it back on. No power at all.
Any suggestions would be greatly appreciated.
Thank you very much in advance.

Posted by on

  • 6 more comments 
  • Marek60 Jun 19, 2008

    Thank you for responding. There was no color flashing during popping. The popping/cracking noise was happening only during power up. Only once it happened during viewing, and after that the TV will not turn on at all. No LEDs flashing, there is no power at all.

  • Marek60 Jun 19, 2008

    I have already checked the fuse and it is OK. You are talking about the fuse on G board, right?

  • Marek60 Jun 19, 2008

    I did not notice any smell or smoke. The last time it happened it was so quick, I did not notice any video distortion. The picture and power just went off in a split of the second. And before then, when the poping was happening at power up the screen was black, the video came on after the pop, so it is hard to say.

  • Marek60 Jun 19, 2008

    I will do that tomorrow. Thank you for suggestion. Can we continue this tomorrow. Also, do you suspect that G board is OK?

  • Marek60 Jun 19, 2008

    Thank you very much. Good night to you too.

  • Marek60 Jun 19, 2008

    Hello Slinteriors,
    I am back. I tried to disconnect the CRT boards one at a time, as you suggested, but still was unable to power up the TV. Any other suggestions?

  • Marek60 Jun 19, 2008

    Thank you Slinteriors. I will do that. I also have a serviceman coming over on July 1st. I will probably wait what he has to say before ordering it. I will just pay him $80.00 for diagnosis and then buy the card from the place you suggested. Thank you very much again.

  • Marek60 Jun 19, 2008

    Ok, I will let you. Thanks again.



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Did you notice any color flashing at all during the poping? As that model is fairly famous for the green CRT shorting out or the flyback arcing. Does the power LED light up at all or possibly blink? Let me know about the LED and I will try to help you diagnose what the problem may actually be. respond to this same post, so I can keep this problem seperate as I have so many responses with different problems that its hard to keep them straight unless we keep using the origional request each time.

Posted on Jun 19, 2008

  • 4 more comments 
  • Sonny Berry
    Sonny Berry Jun 19, 2008

    chances are its the flyback which most likely killed the HO transistor which blew the fuse. un plug the unit and check the fuse if blown you may be able to replace it and get the power indicator to blink an error code. If so that will help great on the diagnosing. But on start up popping sounds like flyback. Let me know if the fuse is blown or if replaceing it will get the self diagnosis blinking.

  • Sonny Berry
    Sonny Berry Jun 19, 2008

    yes. and you didnt notice any video distortion when the poping was happening? How about smell was there a burning smell when it finally went out?

  • Sonny Berry
    Sonny Berry Jun 19, 2008

    being that the fuse isnt blown, its worth trying to pull the CRT circuit boards off each Crt one at a time and try powering up with one crt disconnected at a time to rule out a shorted tube preventing start up.

  • Sonny Berry
    Sonny Berry Jun 19, 2008

    sure we can continue tomorrow. I would think that if its not the CRTs its most likely centerd on the D board. have a good night i will be here tomorrow

  • Sonny Berry
    Sonny Berry Jun 19, 2008

    I believe youre going to need a new D Board. If you go to the following link and leave an email with your model number and ask about a D board they will respond quickly. I am one of their support techs and they have access to any part you would need for your sony, and I can still assist you as I am one of their support staff. Heres the link.

  • Sonny Berry
    Sonny Berry Jun 19, 2008

    Youre very welcome. let me know if you need more assistance.



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