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If I am not getting any voltage measurements on my plasma TV boards, does that mean I should swap out the power supply board?

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Vernon Taylor

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Not necessarily - many modern switch mode power supplies monitor current and will shut down if a fault is detected - a valuable safety precaution against fire.

Plasma tv is a premium product - it is surely worth paying a professional to get a definite diagnosis...

Posted on Jul 05, 2020


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LG px950-ua plasma TV. How do I restore picture and sound?

Before spending more money on boards, measure the voltages that are there. If ok, it's not power supply.

May 21, 2015 | Televison & Video

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quite possibly have defective panel, since you have replaced X,Y & buffers.

Jan 30, 2015 | RCA 42PA30RQ 42 Class Plasma TV - 1024 x...

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Tv want turn on so i install power supply board and it still want come on

Good day!!!!

I need to know if the LED lights ON or blinking if that so how many blinks?

If you have multimeter kindly try this procedure:
  1. Open the back cover.
  2. Look at the power supply board.(it is usually connected directly to the power cord)
  3. Get your multimeter (range in DC).
  4. measure all output to the power supply such as 5vdc,3.3vdc,12vdc,etc..It is usually indicated on the power supply output connector.
  5. Place your black test probe to the ground and the red one is for the positive voltage as stated above and also measure VS and VA voltage..
Then let me know what are the readings of all voltages together with the original voltage marked on those voltages..

Jan 31, 2012 | Sylvania 6842THG 42 in. Plasma HDTV

2 Answers

The t.v powers on for just a second and clicks off. I can hear a click from the back and it recycles off/on over and over.

open the set remove all but the ac cord connectors from the power supply; label them first! turn on the tv if the power supply does not recycle turn off the set and, connect and, disconnect each cable one at a time going to the power supply turning the set on and, off each time as you test until the power supply cycles (fails) again then repair or, replace the circuit board that causes the power supply to fail. if the power supply cycles on and, off (fails) with all connectors but, the ac cord disconnected repair or, replace the power supply.

Jul 19, 2010 | LG 42PC3D 42 in. Plasma Television

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Bliking power light

Call for warrenty repair,the power supply board it dead.The components call capacitors it dying and leakage of gases.

Jul 14, 2010 | Panasonic Viera TH-42PX80U Plasma TV

1 Answer

I have a Th-46pz85u panasonic plasma tv that is blinking the power light 10 times. I was curious to see what the replacement part is to fix that problem. I have the Panasonic error codes and that error...

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.

May 03, 2010 | Panasonic Viera TH-46PZ85U Plasma TV

1 Answer

42 in magnavox plasma tv has sound with no picture I unplugged tv and waited 10 minutes with no luck

Hi my name is Roety,
I can help you with your issue ,
If you have no TV menu either check for any swollen capacitors on the power supply.
If none are found measuring voltages will localize the defective board or boards the voltage test points are marked VA and VS on the panel and boards.
If disconnecting boards restores these voltages the suspected boards must be replaced .
Tech labor is about $250 plus parts.
Suspected boards
power supply
Y sus main & Y buffers  
Logic board
If I have helped you with your issue
If you have more questions you can still respond
I will reply asap

I’m happy to help further over the phone at

Dec 30, 2009 | HP PL4245N 42 in. HD-Ready Plasma...

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