Question about Audio Players & Recorders

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No sound when playing DVD's

There is no sound when playing DVD's. When watching TV, the sound is great. This only recently started and it is intermittent. Some times the dvds will play just fine and then the sound cuts out or it won't have any sound at all. This a Panasonic SA-HT720 that is about 5 years old.

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  • pat31477 Dec 12, 2008

    Thanks for the help but it still isn't working. I even went as far as contacting Panasonic but it looks like I will be buying a new system. Thanks again for the timely answer.

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Does the display still show the time on the DVD as if it is still playing? Or does the time display stop? If the DVD is still playing, you still see the movie going along with no sound, then the problem is in the DVD module board if you are also listening to the tV thru the Panasonic.

The amp is located in the sub-woofer and if the sound is good thru it when using the TV it only leaves the DVD module.

The part number for that part is REP3454G

I am not sure this board is even available. But that is the part number.

It would be a difficult task to determain what components on that DVD module board is bad. I have repaired a good number of these Panasonic systems working at an authorized service center. If you have the right tools, a multimeter and the schematics, I can help you to figure out at component level what is bad. But without those tools and a decent knowledge of electronic components this would be a useless effort. This is a very complicated circuit and could have a good number of different reasons why it cuts out only on the DVD player.

Your best choice would be to take it to a service center for repair, unless you think you can troubleshoot it yourself.

Posted on Dec 11, 2008

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Hi and welcome to FixYa,

On your Panasonic SA-HT720 Home Theater intermittent audio:

  • internal check of the components/boards for any loose connection/cold solder;
  • possible heat related component failure primarily on the capacitors;
  • if for whatever reason, the repair would be required, pls consider the cost;
  • it might be more to your advantage to shelve the repairs and simply purchase an external DVD player to be hooked up to the Home Theater;
  • should you consider a DIY (do-it-yourself), a Service Manual would be invaluable.
Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 11, 2008

  • Louie  Role
    Louie Role Dec 11, 2008

    Since this is a Home Theater with built-in DVD and 6 speakers, the TV connection and the cables would be least likely issues.

  • Louie  Role
    Louie Role Dec 12, 2008

    Hi again,



    Any updates or developments so far?





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You may either have a short in the sound aux cord running from the dvd player to the tv. Check that cord and try getting a new one and see if that solves the problem. If it does not, then make sure all of the connections are firm and in the right place. If that still does not help, you may have a problem inside the dvd player with either with the laser that reads the dvd's for sound and video, or you may have a problem with the part you plug the sound plug in to. There might be a short in either of the connections. If you are not good with electronics, then do not open it your self. Get it checked by a professional.

Posted on Dec 11, 2008

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Try to check thecables connecting to TV from Home theater..it may be loose connection..

Posted on Dec 11, 2008

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It could be the problem with the wire connecting from dvd to the tv replace the wire.and also it could be the problem of the device internally and needs servicing and cleaning.

Posted on Dec 11, 2008

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