Panasonic TH-42PX80U 10 Blinks

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  • smc
    Member
    • Jan 2016
    • 10
    • USA

    #1

    Panasonic TH-42PX80U 10 Blinks

    My plasma TV just stopped working while my wife and I were watching a movie a couple weeks ago. I plug it in, the relays click on, then off, no picture, and the red LED in the front flashes 10 times. I hold the power button in for about 20 seconds, the relays click on, then off, no picture, 10 blinks again. I took the back off and did some poking around with my DMM. I really don't know what I should be looking for. I found this site in my search for a solution. I did test for continuity and shorts, but no voltage tests with the power plugged in or turned on. The only thing I could find was the 681 varistor at the bottom of the power board was bulging and I got no continuity or voltage reading from any combo of the lugs. I went ahead and ordered a bag of 20 from China after the best electronics counter in town didn't have any, and then this morning I came back here to see if this board was back up. I found an actual picture of a refurb power board last night and it looks like both of the varistors on that board are bulging, but I'm thinking that it's not the problem at all. I could not find a thermal fuse in the transformers (like one youtube video suggested) and I got continuity through all the lugs.



    So where do I begin? We have a Samsung replacement, but we like the picture and sound of the Panasonic much better. I don't want to pay $100 for a board that may not work, and I really don't have money to but a crappy new TV or pay the price of a new TV to fix this one. I know I can do this! I fixed our Sony Wega - lamp and better transformer 4 years ago (and sold it). Please help.

    Thank You.
  • tw2005
    Badcaps Legend
    • Oct 2011
    • 6457
    • Australia

    #2
    Re: Panasonic TH-42PX80U 10 Blinks

    see if this helps.
    Attached Files
    Last edited by tw2005; 01-25-2016, 06:42 PM.

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    • smc
      Member
      • Jan 2016
      • 10
      • USA

      #3
      Re: Panasonic TH-42PX80U 10 Blinks

      Originally posted by tw2005
      see if this helps.
      Better than the manual Panasonic sent me, thanks!

      Comment

      • Caleb
        Smokin IC's
        • Feb 2013
        • 645
        • USA

        #4
        Re: Panasonic TH-42PX80U 10 Blinks

        does this set have the mc boards? on the 50"px80U there is a common failure of the tiny smd cap that causes 10 blinks.
        Liberating magic smoke one part at a time

        Comment

        • smc
          Member
          • Jan 2016
          • 10
          • USA

          #5
          Re: Panasonic TH-42PX80U 10 Blinks

          Hopefully these pics show up:
          Attached Files

          Comment

          • vinceroger69
            Badcaps Legend
            • Mar 2012
            • 6714
            • uk

            #6
            Re: Panasonic TH-42PX80U 10 Blinks

            Ignore wrong thread sorry
            Last edited by vinceroger69; 01-27-2016, 02:02 PM.

            Comment

            • smc
              Member
              • Jan 2016
              • 10
              • USA

              #7
              Re: Panasonic TH-42PX80U 10 Blinks

              Finally got the bag of varistors from China. It went quicker and easier thn I thought it would. Still, 10 blinks. I can't find anything else wrong. What am I doing wrong?

              Comment

              • vinceroger69
                Badcaps Legend
                • Mar 2012
                • 6714
                • uk

                #8
                Re: Panasonic TH-42PX80U 10 Blinks

                in post one when you did the tests did you have anything thing plugged into the main board maybe un plug everything ie all cable/hdmi etc do a restet by unpluging and holding the power button down as per this thread see if it now starts up
                http://www.avsforum.com/forum/167-pl...t-turning.html
                http://manualmachine.com/panasonic/t...manual/page:5/
                Last edited by vinceroger69; 03-07-2016, 04:08 AM.

                Comment

                • Moreno83
                  Badcaps Legend
                  • Jun 2014
                  • 2008
                  • The Netherlands

                  #9
                  Re: Panasonic TH-42PX80U 10 Blinks

                  Check on the back of the powersupply. There is a small ic thats probably blown!!!
                  I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

                  Comment

                  • smc
                    Member
                    • Jan 2016
                    • 10
                    • USA

                    #10
                    Re: Panasonic TH-42PX80U 10 Blinks

                    Got off my lazy seat that has too many projects going at one, and followed the troubleshooting guide. Bad K card. How do I test to see if the card is in fact, bad? Cable is good - passes continuity. (Did I say that right? Been outta work for 6 months with a TBI and memory sucks) Where's a good place to get one?

                    vinceroger69: one of those links is gone and the other isn't for my TV. Tried unplugging everything and holding the power button down - still 10 blinks.

                    Comment

                    • smc
                      Member
                      • Jan 2016
                      • 10
                      • USA

                      #11
                      Re: Panasonic TH-42PX80U 10 Blinks

                      I guess I'm on my own...?

                      Comment

                      • martino
                        Not so "senior"
                        • Aug 2013
                        • 997
                        • canada

                        #12
                        Re: Panasonic TH-42PX80U 10 Blinks

                        Does the tv blink 10 BEFORE you press the power button? or AFTER you press the power button? You need to leave it umplugged for at least 10 min,then plug in main,then see blink or no blink
                        Last edited by martino; 03-21-2016, 10:32 PM.
                        Proud owner of dozens of broken TV's and many,many,many boards.


                        Our website and passion:http://hollenhundshepherds.com/

                        Comment

                        • smc
                          Member
                          • Jan 2016
                          • 10
                          • USA

                          #13
                          Re: Panasonic TH-42PX80U 10 Blinks

                          Originally posted by martino
                          Does the tv blink 10 BEFORE you press the power button? or AFTER you press the power button? You need to leave it umplugged for at least 10 min,then plug in main,then see blink or no blink
                          Both. I plugged it in, relays clicked, clicked off, 10 blinks. I held the button in, same thing - relays click, 10 blinks. There are 2 IC's on the board - one with 8 prongs (IIRC), and one with 4. Which one could be blown? I'm sure they both checked out for continuity; I don't know what else to check for.

                          I only found 1 replacement K card, used, and costs more to ship than the card itself.

                          Comment

                          • smc
                            Member
                            • Jan 2016
                            • 10
                            • USA

                            #14
                            Re: Panasonic TH-42PX80U 10 Blinks

                            Nope, not the K card...

                            Comment

                            • Bartcephus
                              New Member
                              • Mar 2023
                              • 1
                              • USA

                              #15
                              Re: Panasonic TH-42PX80U 10 Blinks

                              Greetings All Does the TH-50PX80U have the same A board as the TH-42PX80U only difference would be screen size right????

                              Comment

                              • nomoresonys
                                Badcaps Legend
                                • Jan 2013
                                • 12075
                                • U.S.

                                #16
                                Re: Panasonic TH-42PX80U 10 Blinks

                                what are the symptoms.

                                Comment

                                • Devil_rider
                                  Member
                                  • Jan 2023
                                  • 33
                                  • United States

                                  #17
                                  Re: Panasonic TH-42PX80U 10 Blinks

                                  Look at these 2 workflow charts.they should guide to the bad part. In my experience SS board failed most often on Panasonic plasma.
                                  Attached Files

                                  Comment

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