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I have a Panasonic lcd th-37px50uand after 20 minutes or so the picture becomes fuzzy with horizontal lines from both the top and the bottom. Audio is fine, all channels are affected and when I unplug and let sit for a few hours, it goes right back to normal just to start again in 20 minutes.. I was told that it was the t-con board which on the back of my tv is TNPA3621AB It looks fine, but wanted to know if that is the board that I should replace first? Please help!

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  • jph2 Sep 05, 2010

    I understand that its thermal, but how do you know that its the main board and not an additional board like the t-con?

  • jph2 Sep 05, 2010

    http://cgi.ebay.com/PANASONIC-TH-37PX50U...

  • jph2 Sep 05, 2010

    uuuuugggg. It is a plasma. Sorry, I just looked again. Would you agree that I should replace the main or the t-con board because of the thermal problem. Also, would you use a can of spray freeze to spray on during the "problem" with the picture to know which board it is?

  • jph2 Sep 05, 2010

    This is a really good idea. So I hit with this spray all the IC's, one board at a time. if there is improvement after spray, clearly How will i know what the "main" board looks like?

  • jph2 Sep 05, 2010

    I was told that since its a thermal related issue, that I should spray this "cooling" stuff on each of the IC's during opperation to see if the problem goes away and then replace the board that is the one in question. What are your thoughts on that?

  • jph2 Sep 05, 2010

    I did this and it was great. Knew exactly which board it was. Have already ordered it and will install when I get it.

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Hi:
This a indication of a thermal problem on the main sys control board, problem like this should only be board replacement..Replace the main system control board.

Posted on Sep 05, 2010

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  • Lavell Turner
    Lavell Turner Sep 05, 2010

    Hello:

    There is only to boards that will cause this type of sympton, and the T-Con board is one of them, it is the cheaper of the two boards to replace, one way to be sure is to purchase a can of freeze spray from a local electronics store, and open the back and wait until the sympton comes back, spray the largest IC's on each board, starting with the main board, when sympton goes away that is the board giving you the problems. Dont worry about spraying all areas of the board because the spray is non conductive so the unit can be on while you try this..

  • Lavell Turner
    Lavell Turner Sep 06, 2010

    Ok:

    This is a plasma unit, then your problem lies in the digital board or main system control, this will be the board with the tuner attached to it, sometimes these board are one unit, but in some they are seperate,one would be call the analog board. which is the one where inputs goes in. if the type with one board then replace the entire board, panasonic boards are not that expensive. In most cases replacing the digital board will solve the problem.

  • Lavell Turner
    Lavell Turner Sep 06, 2010

    Its ok to use the freeze spray even during operation as the spray is non-conductive

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Are you sure this is a LCD? Our database says that this is a Plasma?

Posted on Sep 05, 2010

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  • eagle338
    eagle338 Sep 05, 2010

    Plasma tvs do not have a t-con board. It sounds like an issue with buffer boards or sustain board. Possible failed component : Electrolytic capacitors . Component level repair may be possible. So I don't think you have to replace the entire board.

  • eagle338
    eagle338 Sep 05, 2010

    Spray? WHat spray? Who is giving you these weird suggestions?

  • eagle338
    eagle338 Sep 05, 2010

    Does not sound like it but if you want you can give it a shot.

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