Question about Panasonic TH-42PA20U/P 42 in. Plasma EDTV

1 Answer

Panasonic th-42pa20 plasma 42 inch tv

Tv wont turn on standby red light flashes and when tv is on it switches of and light flashes it then takes ages to turn on it clicks to turn on and then you hear another click and then the red light flashes again 12 blinks no picture or sound,replaced 1 cap. in scan board,still 12 bilnks,tried a spare digital board,still no go, any ideas?
thanks Phil

Posted by on

  • 2 more comments 
  • Anonymous Mar 12, 2014

    I have a Panasonic PlasmaTV model TC-P46S1 Serial #ME92460135 Mfg Sept 2009. When I turn TV on there are 2 clicks a pause a third click and then no picture or sound but a blinking 10 code. Is the problem in the SC/Y sustain board?

  • Anonymous Mar 17, 2014

    red power light blinking, hear the tv click on and then off with no picture or sound.

  • Anonymous Mar 20, 2014

    no power, 7 blinking lights
    replaced all the boards and it still has no power, 7 blinking lights and a clicking sound

  • Anonymous Mar 24, 2014

    we turned the tv off had dinner and went to turn it on no picture and blinking light



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 1,894 Answers

Was that capacitor damaged?

Posted on Jan 11, 2008

  • dewan nafees ahmed Jan 11, 2008

    however, I stumbled upon a PDF of a Panasonic training manual. In
    this manual lies a clue as to what the blinking means. It was written
    for older models of Plasmas, but I'm assuming the codes are the same;
    what would the point of service codes be if they changed all the time?
    Under the "Shutdown Detect Circuits" section there are lists of "SOS"
    codes. There are several blink codes from two blinks to 12 blinks all
    meaning different electronic circuit failures or problems.

    the SOUND SOS detection input monitors ofr irregularities in sound output circuit of the PA board. . A defective speaker or excessive current drain of the audio amplifier IC causes the power LED to blink 12 times.

    see page number 47... 3rd point.. that is what the problem you face exactly...

    thank you

  • dewan nafees ahmed Jan 11, 2008

    while in page 42 itself you will know the cause of your problem.. but see page 47 for more detail



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.

Mar 16, 2016 | Panasonic TH-42PV8H 42 inch MultiSystem...

1 Answer


Your TV is showing symptoms of power supply failure. It needs to be repaired or replaced. The remote has nothing to do with the power supply problem

Mar 21, 2013 | Panasonic Viera TH-42PZ85U 42 in. Plasma...

2 Answers

Panasonic 42 inch plasma wont turn on. red light blinks 10 times

I unpluged mine and the light was still blinking when it was unpluged. I thought that was weird. So I pluged it back in and just heald the power button in untill the light went out. It went out within ten seconds. I pushed the power button again and the tv went on. WOOHOO!!! Just needed reset, I guess.

Dec 10, 2011 | Panasonic Viera TH-42PZ85U 42 in. Plasma...

1 Answer

My Tv Panasonic TH-42PZ80BA switched into standby 2 days ago and i cannot get it to come back on again , the red standby lights blinks in a 7 flash cycle , ive tried leaving the power off for a while but...

Yep , I cannot remember offhand but one the the internal boards has failed. The flashing code is telling us which one , will have to check SM to tell you which board but it should be under warranty , get it repaired for free.

May 05, 2009 | Panasonic TH-42PZ80B 42 in. HD-Ready...

2 Answers

Panasonic th-42pa20 plasma 42 inch tv

Try to replace the Main Power Supply board first.

Dec 29, 2007 | Panasonic TH-42PA20U/P 42 in. Plasma EDTV

24 Answers

Panasonic Viera TH-42PV7HS Plasma keeps shutting down

Hi to all, My 42" Panasonic plasma have the same problem. It turned itself off and now red light flashes 7 times, than after short pause 7 times again. And so on. Any ideas what is wrong??

Oct 07, 2007 | Televison & Video

Not finding what you are looking for?
Panasonic TH-42PA20U/P 42 in. Plasma EDTV Logo

1,774 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Televison & Video Experts


Level 3 Expert

5318 Answers


Level 3 Expert

508 Answers

The Knight
The Knight

Level 3 Expert

75017 Answers

Are you a Panasonic Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides