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I have a Panaonic PT-56LCX70K. TV would not come on. I replacd the DPL lamp now TV runs correctly but has very very low brghtness. Note: When TV is turned off the screen goes black bu DPL lamp is still lit for 2 mins, 40 secs. Fan continues to run for another 20 secs. then everything is off. I have cleaned light channel on the lens and prism. 26 volts to LIFI measures 25.8. Do you have a solution to my problem. Thanks.

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  • dianne42 Oct 06, 2010

    Yes, the lamp would not come on at all. Yes I have verified that the power supply is working properly. The voltage with my meter was 25.8. Should that lamp stay on after the TV is shut off. Thanks for your quick reply.
    Dale

  • dianne42 Oct 06, 2010

    Thanks Tim, I also suspect the OPT unit.
    Dal

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So before you replaced the lamp, it would not come on at all, is that correct? And you have verified the power supply is working properly?

Thanks, let me know and I can help
Tim

Posted on Oct 06, 2010

  • Tim Grayson
    Tim Grayson Oct 06, 2010

    My pleasure :) Hmm not it should not stay on like that unless it can sense that it is having heat issues. It sounds like something in the main-board is to blame, the problem with these units is when one thing goes bad it seems to affect many things along the line... usually the main-board.

    I assume there is no way that lamp is getting hot enough for it to need a fan running on it after it's shut off since it doesn't even really get turned on to full brightness?

    Tim

  • Tim Grayson
    Tim Grayson Oct 06, 2010

    I believe you are correct for sure..
    Tim

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