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My Panasonic HD tv (I don't know the real name of it..) makes this echoing, distorted kind of noise after its been on for a while.

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Get a compressed air can and blow out the back of the tv. Should fix problem. If it still does it the you should make sure it does it on all tv ports making sure it does it on other hdmi, rca, ect.. If problem is still ther after checking that you need a new sound board.

Posted on Jan 23, 2013

  • Ian Spencer Feb 08, 2013

    Tried that, but no cigar on stopping the problem. How do I replace the sound board?

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Posted on Jan 02, 2017

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I wish that I had better news.

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Convergence problems are very common on all Projection TV sets including Sony, Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit from the link below.

Common Symptoms include....
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Here are some photos of convergence problems.

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Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solution

93a1209.pngCONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
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I don't know how to remove the echos from you video but think I know what is causing them.
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Second reason is, if you are using a laptop and have added an external microphone between the two it will cause distortion and static.
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