Tc-55as680u steady blink

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

    #21
    Re: Tc-55as680u steady blink

    Originally posted by Moreno83
    Nice and cheap fix! I would order more leds , if 1 goes bad the others will follow
    No need to order more just turn the backlight way down problem solved
    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

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

      #22
      Re: Tc-55as680u steady blink

      Nice work as well I did a 50" Lg panel today with 9 bad in total 2 open 7 shorted I used the stacking method for repair turned the bl down to about 30% looks good and will hopefully last. Keep us updated on it.
      Attached Files
      Last edited by ReeceyBurger123; 09-18-2016, 01:47 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

      • Redlee80
        New Member
        • Sep 2016
        • 7
        • United States

        #23
        Re: Tc-55as680u steady blink

        Attached Files

        Comment

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

          #24
          Re: Tc-55as680u steady blink

          Ok , looks like the backlight is on , is that correct? If so the leds and powersupply are working.

          It looks like a mainboard issue to me. Tried updating the firmware and see if you get a picture?
          I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

          Comment

          • Redlee80
            New Member
            • Sep 2016
            • 7
            • United States

            #25
            Re: Tc-55as680u steady blink

            Yes it powers on but no picture and after some time goes by powers off and then the red light blinks. How do I update firmware?

            Comment

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

              #26
              Re: Tc-55as680u steady blink

              http://av.jpn.support.panasonic.com/.../fw/index.html

              Search the exact model and download the firmware. You need a usb flashdrive.
              They provide instructions how to update the tv. Not sure if it will work but it MIGHT give a picture......

              When did the fault occur?
              I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

              Comment

              • Redlee80
                New Member
                • Sep 2016
                • 7
                • United States

                #27
                Re: Tc-55as680u steady blink

                This tv is outside under my Palapa and last Thursday I went outside to watch football and it was flashing. I unplugged it for a minute or so and then it worked. Friday evening noticed it flashing again but nothing I do seems to get it working.

                Comment

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

                  #28
                  Re: Tc-55as680u steady blink

                  Ok , you don't think it has water damage? ( moist air? )

                  Service manual says 13 blinks is the mainboard. Maybe the cpu has bad BGA Soldering , hard to find out though.
                  Can you try the following?

                  LCD Panel Test Mode Purpose:

                  To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.

                  How to Enter:

                  While pressing [VOLUME ( - )] button of the main unit, press [YELLOW] button of the remote control three times.

                  How to Exit:

                  Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
                  How to confirm:
                  If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns. And then, judge by the following method.

                  Still abnormal picture is displayed: The cause must be in LCD Panel.

                  Normal picture is displayed: The cause must be in A board.

                  Remarks:
                  The test pattern is created by the circuit in LCD Panel.
                  In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal. If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.
                  I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

                  Comment

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

                    #29
                    Re: Tc-55as680u steady blink

                    This is the service manual for the AS650. Don't think there is much difference between those 2 models though. Maybe extra hdmi/usb for example.
                    Attached Files
                    I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

                    Comment

                    • Redlee80
                      New Member
                      • Sep 2016
                      • 7
                      • United States

                      #30
                      Re: Tc-55as680u steady blink

                      I don't think there is any water damage. I had it on a surge protector but we have had some heavy storms lately. I don't have the remote control I typically use the Direct Tv remote and if I have an app on my phone and ipad to control it. Where can i buy an A board? Is it cheaper to just replace the tv?

                      Comment

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

                        #31
                        Re: Tc-55as680u steady blink

                        Nah you need to buy the A board. There is a board number on it TNPH......

                        Just look on Ebay , they are not that expensive. $50/60 i guess.
                        I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

                        Comment

                        • Redlee80
                          New Member
                          • Sep 2016
                          • 7
                          • United States

                          #32
                          Re: Tc-55as680u steady blink

                          TNPH1103 I can't seem to find anything in the United States...

                          Comment

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

                            #33
                            Re: Tc-55as680u steady blink

                            Cant find it either. Maybe look for a smashed tv or mainbkard from the 650?
                            I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

                            Comment

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

                              #34
                              Re: Tc-55as680u steady blink

                              My bad I didn't follow the post properly which is why my first comment is off topic, also I agree with Morie the Mb is failed possibly bga solder issue maybe give it a reflow ?
                              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

                              • Redlee80
                                New Member
                                • Sep 2016
                                • 7
                                • United States

                                #35
                                Re: Tc-55as680u steady blink

                                How do I find a bad solder joint? Not sure what a reflow is?

                                Comment

                                • telephone
                                  New Member
                                  • Nov 2017
                                  • 2
                                  • us

                                  #36
                                  Re: Tc-55as680u steady blink

                                  Hi, picking this t-shoot up again. have this set and does not work (why else would i be here!). plug it in, hear relays click in, then out, a moment later it clicks back in. does not respond to remote. remote is transmitting (observed via mobile phone camera). hold on/off button on rear of set for about five seconds, i hear the relay click, the leds come on, the red power light comes on and there is no picture, but the screen is a dark blue. still does not respond to remote. does not respond to reset (-volume + setup on remote). five minutes later it shuts down. No trouble codes - no flashing power button. Have checked +5, +16 & +24 - all good. Removed and reseated all connectors. Is there any way to trouble shoot this thing?
                                  >> HELP <<

                                  Comment

                                  • telephone
                                    New Member
                                    • Nov 2017
                                    • 2
                                    • us

                                    #37
                                    Re: Tc-55as680u steady blink

                                    update to previous -
                                    Updated information. After the unit shuts down after the approximate 5 minutes of on-time, sometime after that it starts flashing the power led - 13 times. AND, I can turn the unit back on with the remote - but still the same blue screen - and no further responses to the remote. it then shuts off after another five minutes.

                                    Comment

                                    • Bigkahuna427
                                      New Member
                                      • Jan 2018
                                      • 7
                                      • United States

                                      #38
                                      Re: Tc-55as680u steady blink

                                      Hi Guys,

                                      I have the same model build date is Feb 2015. My symptoms are a steady blink from the power light and nothing else. One blink 3 seconds one blink. I have the back off and it has 5V standby power but not the 16V to the main board. When I plug it in here is a black relay that clicks the backlight LEDs flash a couple of times and then clicks again which is when the power light starts flashing again. I am assuming this is a protection relay. When it clicks the first time (I assume on) I get the 16V at the jumper that says SRV 16V. I did disconnect the T-con board and the protection relay still clicked on and off. I am not sure if disconnecting the T-con board isolates the LEDs as the original poster had LED issues causing a similar problem. I hope this is enough to get started and someone is willing to help. Can someone help me isolate this problem?

                                      My skills are mostly self taught and I have been repairing old audio amplifiers and receivers stuff like Marantz Sansui etc so this is all solid state stuff. I have little or no experience with LCD TVs. I certainly do have a multimeter, solder station, Chinese component tester etc.

                                      Comment

                                      • psp_comm
                                        New Member
                                        • Dec 2020
                                        • 1
                                        • Huston, tx

                                        #39
                                        Re: Tc-55as680u steady blink

                                        Originally posted by phat34
                                        Your first hunch was right... It was 1 LED that was keeping the whole TV from working... I jumped it with a wire until the part comes in.

                                        3rd row 3rd led... go figure.

                                        Thanks so much for all you help...
                                        Can you please show in your picture, where this 3rd row 3rd led is?

                                        Comment

                                        • Garykapda
                                          New Member
                                          • Dec 2020
                                          • 1
                                          • United States

                                          #40
                                          Re: Tc-55as680u steady blink

                                          Hello, I now have the exact problem that phat34 had, I cound not understand how he "jumb" the wire to identify what led is bad.. Can someone help me?

                                          Comment

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