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Panasonic Plasma TV (Model TH-42PZ85U). The TV does not turn on at all. When plugged in, 2 relays on the power board click, then the front LED blinks 10 times. The service manual says this is an S.O.S. for 3.3V or 5V or 9V on signal board, but I think the problem is with the 15V supply on P board (from which the 3.3V, 5V and 9V are derived) since the 15V supply does not measure any voltage at all at any time... It is a very widespread problem and I would like to repair it. I want advice regarding component level repair for my TV. I am not interested in replies such as "buy a new power supply". I know I can just replace the P board (power board) but I want to repair it. I look forward to your reply...

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  • Unspun01 Apr 24, 2012

    I've solved this problem myself. Replaced the modules MC201 and MC301 and this fixed the problem. Also replaced a small zener diode in the 15V circuit that tested bad (as a short circuit). My TV is now working.

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Your thinking is somewhat higher than any of us. Do what you wish.

Posted on Mar 25, 2017

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Replaced the sc board and tv works fine again.

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phil_frye
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Either a bad power supply or a bad processor board.
A Good Service Shop should know what the 10 blinks are indicating.
May be a repair cost between $200 and 400 dollars.
Be prepared -
Blessings,
A/V Media Guy

Posted on Nov 22, 2009

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SOURCE: I have a Th-46pz85u panasonic plasma tv that is

Yes,this codes is a 100% correct is ur power supply board.U searches all around the power supply board and it supporting boards for those leakages gases capacitors?These capacitors alway have bulges on it top or puff on it top.Replaced these bad capacitors,u will get ur power voltages stable and ur power supply board will work.Not,than one or more of ur power transformers have a shorted power pins legs.The power transformers,coil is dead.The transformer must be replaced.

Posted on May 03, 2010

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SOURCE: plasma 50 inches dont turn on

The power supply board is dead.Tries the websites like Shopjimmy.com,Ebay.com to buy the refurbish power supply board for the replacement.

Posted on Jun 22, 2010

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SOURCE: Panasonic Plasma TV (TH-50PZ80U) blinks 10 times,

I'm not sure of how to solve this problem but I would be interested in hearing more about your experience. I'm a factual researcher for a law firm that is putting together a class-action lawsuit against Panasonic concerning the blinking light issue many of their plasma tv models are having. If you'd be willing to share your story, please email me at kiaeger@levjen.com.

Posted on Nov 12, 2010

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1 Answer

Owners manual


Panasonic has most of their product manuals on the product support page. For the TH-42PZ85U, see http://shop.panasonic.com/shop/model/TH-42PZ85U?t=manuals&support#tabs . Look for the Owner's Manual tab.

The direct link to the manual is http://service.us.panasonic.com/OPERMANPDF/TH42PZ85U.PDF .

I hope this helps.

Cindy Wells

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1 Answer

How to reset tv


hi Tracie,
is the set making a clicking noise?
is the power light flashing on the front?
or no power light at all just dead?
if the set is just dead, just put your ear to the back vents can you hear like a very faint screaming noise and can you smell and burning in the vent?
if so it just could be capacitors on the power board.
if its clicking the that will need a service kit on the power supply board.
if the power led is flashing then you will need to count how many flashers from start to finish when you first turn set on.
hope this helps.
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721df811-02b9-4fce-8217-60f97c4e77fb.jpg

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I purchased one from panasonic directly. TV did power up but did return to 7 blinking lights. Must be a buffer board short that caused the SC board to fail. . Not spending another $200.

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1 Answer

Plasma screen does not come on and power supply board is bad


When the Plasma TV is plugged in, there're a fewindications of normal operation. Knowing this will help usunderstand what's going on with the unit when anabnormality occurs.1.There is a click from the relaysRL402andRL403when they are activated.2.The LED in the Optical Jack inside the DT board turns on for approx. 4seconds.3.Immediately after that, one of the Tuner LEDs (Right) turns on(Solid Red)for approximately 20 seconds.4.The LED in the Optical Jack inside the DT board turns on again for approx.1 second and both LEDs (tuner and optical jack) turn off.5.Then you will hear another click from the relaysRL402andRL403indicating that they are no-longer engaged. (Note: At this time the Tunerand the Optical Jack LED turn off.)5

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1 Answer

Panasonic plasma tv th-42pz85u has no pitcure and the LED light is solid red


Check this link to know the cost and availability of the power supply board to your TV. It will be best to replace it as card basis. The power supply regulator board is faulty.

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Hello,

The power supply board of the television 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.

I hope this will help in solving the problem....

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1 Answer

The TV does not turn on at all. When plugged in, 2 relays on the power board click, then the front LED blinks 10 times. The service manual says this is an S.O.S. for 3.3V or 5V or 9V on signal board,...


Want to do the repair on the PS? Then get out your unsoldering tool and unsolder all the suspected parts, caps, diodes, resistors, relays, etc., making notes of where they came from and noting polarities. Then whip out your test gear and start working. Replace any and all defective parts as you come to them. If you have any IC's on the board you are sh-- out of luck - you replace if you are successful at getting the old one out. Still wanna repair? Good luck to you.
Psst - you send it out for repair and the dude is gonna replace the board - trust me.

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1 Answer

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hope this helps!

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