Question about Panasonic PT-56LCX66 56" HDTV

2 Answers

Can't power up

Hello,

I have a Panasonic PT-56LCX66 rear projection TV, almost 3 yrs old. Got home last night & the wife told me it wasn't working. When you press the power button, the green LED continually flashes, after maybe 20 seconds, there is a weird buzzing noise for about 3 - 5 seconds from the back of the set. This cycle continues 2 more times until the power LED turns red & the set turns off. Any sugestions appreciated.

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  • 1 more comment 
  • JayT1141 Sep 13, 2008

    Tim,



    Thanks for the quick response, would the buzz form the ballast be audible from across the room if the lamp was gone, lamp warning LED never came on. I'm not at home now, will check lamp when I get home. BTW, on my TV lamp is accessed through a panel on the front. Also, I have a 5 yr warranty through the retailer, but it may take them weeks to fix, so I'm just trying to see if it is something reasonably simple, as I have an extensive tech. background, boardwork, etc.

  • JayT1141 Sep 14, 2008

    Tim,



    The lamp physically looks blown & measures open across the two pins that would plug into the set. I assume on a good lamp, these should measure closed like a lightbulb?

  • JayT1141 Sep 15, 2008

    Thank you for your help Tim, I actualy received the same info about testing the bulb from a local technician this morning. Looks like I'm ordering a lamp which Panasonic doesn't even appear to have in stock right now.

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Lamp/balist power supply is need to but this set i one of 3000 of them that have a bad olpblock to
i was a tech at quaker tv hear in queensbury ny for 9 years i see a lot of this set come in with bad opticblock.

Posted on Jun 02, 2009

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The buzzing noise you are hearing is most likely the ballast fire, this is good. You most likely have a bad lamp which is the best case for you. I would recommend pulling the lamp out and looking at it to see if its physically shattered or not.

The instructions for pulling the lamp can be found in your owners manual. If you do not have this anymore just look on the sides or the back of the tv for a small door with a screw or 2 in it. take those screws out and the door should come off, then take the screw(s) out of the lamp and pull it out. if you see glass rolling around inside you will need a new lamp. Let me know and I will help you find a good one at a good price.

Tim Nolan

Posted on Sep 12, 2008

  • 1 more comment 
  • experttv
    experttv Sep 13, 2008

    If the lamp is shorted then you might hear the buzz from across the room, but this wouldnt be ballast fire it would be a ballast trying to drive a shorted lamp. Best thing to do is look at the lamp first and then if it looks good try to pinpoint where the buzz is coming from and let me know so i can help your furthur.



    Tim Nolan

  • experttv
    experttv Sep 14, 2008

    A lamp is not the same as a light bulb, it is checmical and will not read shorted like a filiment in a light bulb. But if it looks blown or theres glass rolling around inside of it then it needs to be changed. Let me know if you need more help!



    Tim nolan

  • experttv
    experttv Sep 15, 2008

    Looks like its on back-ordered with all my vender's as well...hope you get one soon.

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Here are the steps to reset the Lamp Timer for your Panasonic Multimedia Projection HDTV:

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