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Panasonic model TH-42PW4 manufactured 2001. TV cuts out and goes into stand-by. Sometimes only bottom half of display works. Can hit on button and it will come back on, not dead yet. Dennis

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  • 3 more comments 
  • TH42PW Sep 11, 2008

    Power button is not my problem. Can you get me more specific information on which parts to purchase to fix this. If power supply what part number if you know this. If some board what board? Could it be the Y-Stain board? So am I asking to specific of questions?

  • TH42PW Sep 11, 2008

    This is not a projection tv. I have unplugged the tv in the recent past attempting a reset of some sort. This problem has continued for about 3 weeks. I am prepared to replace components but would like direction on which one to replace. Would like to get parts from ShopJimmy.com if possible. So far I have yet to get to one of you real technical tv pro's. No slam intended. This old of a TV could cost me a few hundred or more if I take it in to be repaired. Any other ideas? Please don't give up on my problem.

    Dennis










  • TH42PW Sep 11, 2008

    With responses like this my TV will never get fixed. This is not working.

  • TH42PW Sep 12, 2008

    TV getting worse now attempting to power it up results in going into stand-by. Green power light flashs red. Sometimes I can get a picture after several attempts. It is broken.

  • TH42PW Sep 12, 2008

    No great detail, the TV is dead.

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Hi,
Please just see Jaime867's answer.
Bye.

Posted on Sep 12, 2008

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It sounds a bit like power supply to me but with the darkeness can mean the pic tube has run on ya or even a resistor or capacitor

Posted on Sep 11, 2008

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I would suggest to measure the voltages from the power supply to the Y and X sustainer boards, the voltages should be written on the boards next to the connectors. If the voltages appear normal, there could be a loose contact in one of the flex wires that connect the Y or X boards to the main board.

Posted on Sep 11, 2008

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Hello,

I saw this one when the new models came out in Feb. To get around this with any IR remote, you need to...

Stack the discrete "on" code either 4 or 5 times (verify number on-site) - no delays - to get the panel to power all the way up.

This has fixed 100% percent of our systems that displayed this problem.

Hope it works for you.


You can download the latest Plasma tools here:

(http://www.pixelmagicsystems.com/support/downloads/firmware/index.htm)


Thank You

Posted on Sep 11, 2008

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Hi sir
there may be problem in cathode ray tube or diplay settings follow this...Opinions differ on exactly how to prevent noticeable burn-in. This seems to be the common wisdom:

  1. Turn down the white level (contrast/picture). Most displays ship WAY too bright. See the calibration section for more details.
  2. Don't leave static images on the screen for a long time. Be careful of network logos. If you watch only one network with a high-contrast logo for hours on end, beware.
  3. Turn down the white level.
  4. Don't watch a lot of 4:3 material. If you do, zoom or stretch the picture to fill the screen. For those few shows which you simply must watch in their original aspect ratio, use gray side bars. But don't be too reliant on those side bars -- even gray side bars eventually cause burn-in. That said, the occasional 4:3 show, even with black side bars, shouldn't cause undue problems.
  5. TURN DOWN THE WHITE LEVEL.
  6. Use an orbiter. Opinion differs on how effective this really is. It seems to make the burn-in edges a bit less sharp and conspicuous, though.
  7. TURN DOWN THE WHITE LEVEL! (Get the idea?)
  8. Get in the habit of using a screen saver. Using the White Bar Scroll for a few minutes at the end of each day should go a long way toward countering the effects of side bars, network logos, and whatever other less-than-optimal things you put on your screen.
  9. thanks;;;;;;;;;;;;rate itIn a word, don't. See the service menu warning above. If you're bound and determined to make use of the service menu, buy the service manual. It contains more than enough informa......
    .

Posted on Sep 11, 2008

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Try unplugging power for fifteen or twenty minutes, see if this basic reset can fix the problem.

If you have a dark shadow on the upper part of the screen it is probably one of the mirror in the light tunnel that is out of place.

If light tunnel is ok then there is something in the middle of the light beam, this talking about a projection TV.

On other models is just a faulty component.

The TV must be taken apart and inspected internally to fix this problem.

Posted on Sep 11, 2008

  • Ginko
    Ginko Sep 11, 2008

    Hi, sorry, my first answer was for an LDP TV, things are much different on a plasma.
    The black half screen of death is a common problem on plasma, and there can be more then one fault causing same effect (see here:Half Black Screen - AVS Forum)

    First inspect the aireation intakes at the back of the TV, if you find dust over there , clean it with a hoover, bad ventilation and overheating can be a cause for this problem.

    Try gently wacking the TV on the sides, if this affect the problem, then it is probably a bad connection (t Ysus board likely).

    If the above did not work it is likely to be the Ysus or Zsus board. On Panasonic this boards are called just PC board, you will need the service manual to identify the right part.

    Here you can buy the service manual and all parts for your TV.


    Regards





  • Ginko
    Ginko Sep 11, 2008

    Try first the tricks above, see if by chance you can fix it.



    If you does not fix it you can call the phone number at the end of the user manual to contact PANA. If
    the unit is still under guaranty the job can be done for free.

    If guaranty is expired you should be able to buy an extension that will
    be less that the repair fee and will cover you for one year or two.


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Well Dennis I do not want to discourage you , But it is a problem with the power module or the the board

just for kicks have you seen if the remote Power Button is sticking or the TV
I know this sounds crazy but if the remote is sticking it will send an IR signal
to shut off/stand by


Thank You
jayson

Posted on Sep 11, 2008

  • 2 more comments 
  • Jayson Brollini
    Jayson Brollini Sep 11, 2008

    Ok here is the price list and All the parts that I had mentioned
    www.electronica-usa.com/Merchant2/merchant.mvc?



  • Jayson Brollini
    Jayson Brollini Sep 11, 2008
  • Jayson Brollini
    Jayson Brollini Sep 11, 2008

    I am still here Your tv model that you supplied me is coming up as a Projection

    Can you please verify the Model Please
    I am very sorry


  • Jayson Brollini
    Jayson Brollini Sep 12, 2008

    This is what I am going to suggest and Please we understand your frustration
    it is very difficult to direct you into the exact problem without testing the board or
    the other components.. If I suggest to purchase a new power module for your TV
    and that was not the Fix... I wasted your time and Money. A TV Repair specialist will
    charge 25 to 50 dollars to look at it and tell you the part that needs to be replaced.

    This would give you the best info so if you decide to fix this yourself you will have the part that
    needs to replaced and then go online to the dealer and order it. Most of this parts that have been mentioned to you can be fixed/installed by a novice.. With online instructions you should feel very confident. But you can make a choice as what will be the cheapest route for you.

    So Please understand somethings can be fixed online but for us to give you the exact parts is extremely difficult... When you bring the TV in let him know that it is Flashing(that is a code) Please understand..

    Thank You
    Jayson

    Please rate your FixYa experts solution.


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