Question about Hitachi 42EDT41 42 in. HD-Ready Plasma Television

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I replaced main power unit and and formatter PWB but I cannot keep tv on. It turns on, I hear some buzzing then a faint click followed by an immediate louder cllick and powers off alltogether? Need help Please!

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  • gregjones197 Nov 15, 2009

    This is a plasma tv...

  • gregjones197 Nov 15, 2009

    i have the service maual and there is no 'main board'!



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Power cycle clicks and goes away due to the following reasons
- Power supply defective.
- Mainboard defective

Try opening the back of the TV and try to find out any swollen or leaked or shorted out capacitor, this must be the issue for getting clicks...

These capacitor can be found either in the power supply board or the main board, since you had changed the power supply board i suspect this to be found in the main board...

The repair is pretty simple and straight forward; just 4 screws and a couple of plugs and changing the shorted things, this should oslve your issue.

Please leave me comment,if you need further assistance
Thanks for using FixYa!

Posted on Nov 15, 2009

  • Vinod Kumar
    Vinod Kumar Nov 15, 2009

    You can see a patch of cord connecting from the power board to the another board, the another board is called as a main board


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If power supply is good and voltage measures out ok. Also check any relays or capacitors.If LCD, check caps, if projection, check bulb and high-voltage transformer and flyback with a voltmeter.
Capacitors are the most common reason for failure in today's electronics.

Posted on Nov 15, 2009

  • Nate Stansfield
    Nate Stansfield Nov 15, 2009

    The power supply in most of today's electronics have one of the highest failure rates. You can check with a voltmeter and test where the power supply wiring connects to main circuit.



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