Pana TX-P42G20B int. no power up / 13 red blinks

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #1

    Pana TX-P42G20B int. no power up / 13 red blinks

    I have one of these nice 42" 1080p Panasonic sets in for repair.

    Originally went to pick it up, asked the guy to plug it in and it worked! Hahaha! He did not want to sell it, but it was eBay... Couldn't believe my luck but it then shut down a few minutes later and wouldn't power on. So... not that easy, unfortunately.

    Normally, powers on with no picture, no panel prime, green light only. Have occasionally seen it power on with brief panel prime then that goes away. Sometimes after being powered on with the green light for 5-10 minutes it'll shut down with a red 13 SOS. Haven't had a chance to check the SOS history as I haven't had it power on since picking it up.

    I'm leaning towards the main board as all power rails from PSU are good (including Vsus & Vda), plus I don't see any control signals coming out of the main board. Any tips?
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.
  • Alastair E
    Chief Womble
    • Mar 2013
    • 1963
    • U.K.

    #2
    Re: Pana TX-P42G20B int. no power up / 13 red blinks

    That'll probably be poor soldering on the mainboard bga chip.

    It's all wrapped up with the Sound supply and the video processing...
    TELEFIX

    How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
    http://www.irf.com/technical-info/appnotes/an-1088.pdf
    PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #3
      Re: Pana TX-P42G20B int. no power up / 13 red blinks

      That's my current train of thought but I'm hoping it's something else first, like a bad/intermittent voltage regulator.
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

      Comment

      • Malachi
        Badcaps Legend
        • Dec 2015
        • 1077
        • Usa

        #4
        Re: Pana TX-P42G20B int. no power up / 13 red blinks

        Sorry
        Last edited by Malachi; 02-12-2016, 03:01 PM. Reason: Sorry.

        Comment

        • tw2005
          Badcaps Legend
          • Oct 2011
          • 6457
          • Australia

          #5
          Re: Pana TX-P42G20B int. no power up / 13 red blinks

          Going to be A-board Tom I feel. The U20 I had, had issues similar to that. Even with heatsinks these run crazy hot. What's board availability like?

          Comment

          • tw2005
            Badcaps Legend
            • Oct 2011
            • 6457
            • Australia

            #6
            Re: Pana TX-P42G20B int. no power up / 13 red blinks

            Originally posted by Malachi
            I'm starting to thing it's not even worth trying to fix these things.
            I've had a th-42pz80u on Craigslist for a few weeks now for $150 and no interest.
            Some guy offered me $100. For a 1080p plasma!
            I have a th-42pe7 with 12 blinking sound SOS that I got for a 12 pack. A main board is $100.
            Not worth it. And it's a 720p.
            Could someone with limited soldering skills repair the mainboard?
            If this is what is considered thread jacking forgive me. I'm new.
            Yeah, I think you just hijacked why not start a whole new thread and we can go bezerk on the topic there

            Comment

            • Malachi
              Badcaps Legend
              • Dec 2015
              • 1077
              • Usa

              #7
              Re: Pana TX-P42G20B int. no power up / 13 red blinks

              Sorry. I didn't think it was worth the thread seeing as how the TV isn't worth anything.

              Comment

              • tw2005
                Badcaps Legend
                • Oct 2011
                • 6457
                • Australia

                #8
                Re: Pana TX-P42G20B int. no power up / 13 red blinks

                SJ have a few at $50 USD

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: Pana TX-P42G20B int. no power up / 13 red blinks

                  I bought the TV for about £35 / $50 and can sell them for £150 / $220 working so it's worth it, but only if a main board isn't too expensive.
                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                  Comment

                  • tw2005
                    Badcaps Legend
                    • Oct 2011
                    • 6457
                    • Australia

                    #10
                    Re: Pana TX-P42G20B int. no power up / 13 red blinks

                    Originally posted by tom66
                    I bought the TV for about £35 / $50 and can sell them for £150 / $220 working so it's worth it, but only if a main board isn't too expensive.
                    I'm hearing you, So what Telly is parked in Tom's house these days?

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #11
                      Re: Pana TX-P42G20B int. no power up / 13 red blinks

                      Originally posted by tw2005
                      I'm hearing you, So what Telly is parked in Tom's house these days?
                      Pioneer PDP-LX5090 for living room
                      Panasonic TX-P42U30B for bedroom

                      (The last one got a LOT of use when my gf visited the other night )
                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                      Comment

                      • tw2005
                        Badcaps Legend
                        • Oct 2011
                        • 6457
                        • Australia

                        #12
                        Re: Pana TX-P42G20B int. no power up / 13 red blinks

                        Originally posted by tom66
                        Pioneer PDP-LX5090 for living room
                        Panasonic TX-P42U30B for bedroom

                        (The last one got a LOT of use when my gf visited the other night )
                        The U30 should have a good pic. I'm gradually changing over.

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #13
                          Re: Pana TX-P42G20B int. no power up / 13 red blinks

                          The picture quality of the U30B is better than my Kuro, with exception of the black level. But even the black level is pretty dark, at least 4x darker than an LCD...not to mention the excellent motion response, colour, and overall image quality.

                          It does get IR fairly quick, but no burn in.

                          Not sure how much it matters when doing marathon runs of "Rick and Morty" though.
                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                          Comment

                          • tw2005
                            Badcaps Legend
                            • Oct 2011
                            • 6457
                            • Australia

                            #14
                            Re: Pana TX-P42G20B int. no power up / 13 red blinks

                            Originally posted by tom66
                            The picture quality of the U30B is better than my Kuro, with exception of the black level. But even the black level is pretty dark, at least 4x darker than an LCD...not to mention the excellent motion response, colour, and overall image quality.

                            It does get IR fairly quick, but no burn in.

                            Not sure how much it matters when doing marathon runs of "Rick and Morty" though.
                            "Rick and Morty" ,LOL, had to google it.

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK

                              #15
                              Re: Pana TX-P42G20B int. no power up / 13 red blinks

                              It's pretty bloody addictive haha!
                              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                              Comment

                              • ReeceyBurger123
                                Never Give Up !
                                • May 2014
                                • 7325
                                • Britain

                                #16
                                Re: Pana TX-P42G20B int. no power up / 13 red blinks

                                Did you sort this Tom ? The main processors that seem to also integrate the Tcon get VERY hot enough to hurt your finger if you put it on them for a little while. Poor design really needs to be fan cooled or a big heatsink !
                                Last edited by ReeceyBurger123; 02-29-2016, 04:18 PM.
                                Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                                https://www.facebook.com/Telford-Tel...7894576335359/

                                Comment

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