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Hitachi plasma, model 50pd960dta, has no picture, sound ok. Power supply ok has new unit in it.The output voltages for the vs & va outputs shut down.This is my problem, can you help, We have a manual, but not this is not very helpful with this particular problem. Thank you, hope you can help Rick.

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  • imagees Jun 19, 2009

    Thanks for your comments,however, be assured!!! no picture or menu will be displayed, because the units power to the sustain boards are not present (i e VS & VA ) . Do you have anything you might suggest? There is a fault causing the power supply outputs to the sustain boards to shut down.

    Rick

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  • Master
  • 355 Answers

Are your aware of the small pushbutton "master switch" which is located below the tv screen ? it is normally located on the right side about 4" from the edge. if turning this switch on doesn't fix it, replace the "smps"...switched mode power supply

Posted on Jun 19, 2009

  • 1 more comment 
  • Rohit  Asthana
    Rohit Asthana Jun 19, 2009

    or may be blown capacitors on the inverter / vga board replace them and al will be good.

  • Rohit  Asthana
    Rohit Asthana Jun 19, 2009

    u have a damaged Plasma panel .
    If this is not the problem you
    could have a bad logic or y-main (most common problem) will need to
    perform a white screen test on the plasma panel to verify this is the
    problem.

    This is what u need to do

    1. Remove the back panel of the TV.

    2. Remove the Small Signal Board bracket ( the two long bars on back of
    the plasma panel, the bracket that is connecting the two with SSB on
    it, remove this and disconnect the connectors to the power supply
    (CN1M02,CN1M03, CN1M45)except for the main power plug in you will still
    need this)

    3. Once u remove the SSB bracket you should see a plasma panel resembling pic 1.

    4. Place a jumper wire or connect the two pins (CN 2012) on the logic board located underneath the SSB bracket.

    5. Also place jumpers on the power supply (J8003 and J8004)

    6. Now plug in the power supply, U should hear the relays click and
    after 5-10 sec you should see a green led on power supply, and 2 green
    leds on logic board 1 will be solid and 1 will flash.

    With this set up you should get a white screen on your TV this will let you know if the panel is bad or not.

  • Shannon Walsh
    Shannon Walsh Oct 30, 2011

    Having the same problem i was able to get the tv going by pressing the master switch reset, thanks for the advise.

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  • Master
  • 19,396 Answers

Hi Rick

To start ensure that is picture in picture on, that will cause sound but no picture.

Also ensure that you have sound but no picture on different input , and with different devices attached, otherwise the problem can be video cable or input board.

Also try a factory reset. Press Menu Button, then in sequence 4, 7, 2 and 5 to enter service menu.

In Service menu Go to Options, then chose Factory Reset, wait a couple of seconds
Press Escape, Standby and Unplug from Main, waiting ten minutes , then turning TV on again

Other than this , and the PSU, parts that can give you no raster on plasma TV are the Sustain boards , input output connectors, and the buffer boards.

Parts must be tested before replacement.

Regards.

Posted on Jun 19, 2009

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