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My Panasonic TH-42PZ77U will not turn on.

My TH-42PZ77U (Panasonic 42" Plasma tv) will not turn on. I get 7 blinks on the power button. The fans start up but then shut right back down.

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  • patsoxfan Jan 21, 2009

    Thank you very much! Panasonic is not much help!

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It sounds like you have a bad main board

Posted on Jan 11, 2009

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That is true 7 blinks on service manual is progressive scan board, often the 7 blink are caused also by a faulty power adapter, that does not supply right voltage to the board.

In either case you need a technician, replacing the part witout testing it may be only a waste of money.

Regards

Posted on Jan 11, 2009

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The 3rd board (the largest) called an SC board has failed. Has to do with voltage regulation.

Call your serviceman, and he'll have you going in 15-20 minutes.

Posted on Jan 11, 2009

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Its the problem in the circuit board that has to be checked by a meter and the faulty components has to be replaced to make it proper.

thanks.

Posted on Jan 11, 2009

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The 7 blinks means that the SC scan drive board might need to be replace but only after checking the voltages from the power supply. If the voltages from the power supply are normal, then proceed to replace the SC scan board.
Click here to find the board you need

Posted on Jan 11, 2009

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Panasonic TH-42PZ77U HD Plasma tv has 10 blinking lights


Hello,

Ur power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your tv power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


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replace sc board and do firmware update or problem will come back!

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Marine on a mission here! To help every one that takes the time to post their problem. Times are tuff. PPL need to put food on their tables and not worry about calling in a tv repair man and spend hundreds. Took me a year to get the fix. Fixed 2 50" plasmas for 80 cents. After being told it would be better to replace than repair. BS! I held out glad I did. This is free advise, it will cost your your time and some pocket change.

Semper Fi

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your sc bord is shot replace board and do firmware upgrade will coast about 400

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Most people call this "The blinking light of death".(part went bad)
Your TV when into protection mode to prevent further damage.
The repair shop may cost over $100 for someone just to look at it.
Or if you know someone with electronic repair knowledge, they have a service manual at nodevice.com
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