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55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

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    55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

    Model type:
    VIERA TC-P55GT30

    One day my 55-inch plasma Viera HDTV just died. Tried to turn it back on and got the "seven red blinking lights of death."

    So today I pulled off the back and took pictures. I know I have a *very* shaky camera hand due to repetitive-strain problems, but I did the best I could by bracing the camera and took as many pics as I could of all the relevant hardware.

    Does anything stand out as obviously busted?

    1: http://i.imgur.com/AjFM8.jpg
    2: http://i.imgur.com/ytila.jpg
    3: http://i.imgur.com/N4yjU.jpg
    4: http://i.imgur.com/7hT0k.jpg
    5: http://i.imgur.com/1drct.jpg
    6: http://i.imgur.com/bPBVl.jpg
    7: http://i.imgur.com/E5Xys.jpg
    8: http://i.imgur.com/Peh76.jpg
    9: http://i.imgur.com/u3ADK.jpg
    10: http://i.imgur.com/bCCwf.jpg
    11: http://i.imgur.com/P8AcG.jpg
    12: http://i.imgur.com/T5exS.jpg
    13: http://i.imgur.com/ZSx71.jpg
    14: http://i.imgur.com/KRyWy.jpg
    15: http://i.imgur.com/CDLz6.jpg

    EDIT: I also found but unfortunately this did not seem to have info relevant to this issue (or a diagram of the hardware)

    EDIT: Found service manual
    Last edited by KongRubix; 12-22-2012, 11:05 AM.

    #2
    Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

    Here is the service manual for your set.


    7 blinks:
    Driver SOS2
    (SU/SD Connector DET)
    (SU/SD Scan and Logic IC)

    This indicates an SU/SD fault; possibly a loose board connector, or a mis-seated connector leading to the panel.

    However, I have heard that the SU/SD boards on this model can sometimes be damaged by a bad plasma panel. In which case the fault would not be repairable...
    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


      #3
      Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

      How would I know if it's a loose power board connector? I am not hardware-literate at all whatsoever. What do these connectors look like?

      (Thank you for the very fast response, btw)

      EDIT: With some Googling I also see it can be a SC-board failure (and based on the manual I think I know which board this is now) -- is this what you refer to with SU/SU faults?
      Last edited by KongRubix; 12-22-2012, 11:11 AM.

      Comment


        #4
        Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

        This photo:
        http://i.imgur.com/E5Xys.jpg
        http://i.imgur.com/bCCwf.jpg

        Tighten ALL of the screws on this board; they were shipped loose from the factory.
        Reseat that white connector (on both the upper and lower boards.)

        Did you TV have the infamous Panasonic "buzz" before it failed?

        If all of these fail, replace the SU and SD boards. However, take heed that it -could- be a defective panel.
        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


          #5
          Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

          Originally posted by tom66 View Post
          This photo:
          http://i.imgur.com/E5Xys.jpg
          http://i.imgur.com/bCCwf.jpg

          Tighten ALL of the screws on this board; they were shipped loose from the factory.
          Reseat that white connector (on both the upper and lower boards.)

          Did you TV have the infamous Panasonic "buzz" before it failed?

          If all of these fail, replace the SU and SD boards. However, take heed that it -could- be a defective panel.
          I completely forgot to mention that but you're absolutely right; there was a rather loud buzz (louder than usual) for a few minutes before the TV died. I didn't think anything of it at the time until the TV died.

          When you say "upper and lower" boards do you mean the two connectors, one in the upper left and upper right of http://i.imgur.com/bCCwf.jpg ?

          Comment


            #6
            Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

            Screwed everything down hard (most screws were OK, one or two were a bit loose)

            Comment


              #7
              Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

              Yep, those, plus this one on the bottom of the image.
              http://i.imgur.com/E5Xys.jpg

              The buzzing is related to the screws being loose. The loose screws may have damaged the SU/SD board (I do not know.)

              There will be a part number on the SU and SD boards; these are the boards that connect to the larger SC board via the white connectors. The part number will be like TNPAxxxx. What is the part #?

              7 blinks is unlikely to be SC failure, but I wouldn't entirely rule it out.
              Last edited by tom66; 12-22-2012, 11:27 AM.
              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


                #8
                Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                I know you probably know all this, I'm posting this more so for my own sanity/mapping things out:

                http://i.imgur.com/Bnfh3.jpg

                To answer your question:
                SU: TNPA5340
                SD: TNPA5341

                Can't really pull out the connectors to re-plug them back in, still trying

                Comment


                  #9
                  Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                  Unhooked and reseated the white connectors on the SU/SD boards to SC board (SC41-SU41, SC46-SD46, SC42-SD42)

                  EDIT: Unplugged and replugged in the white thing with the white/brown cord

                  According to the manual it is the "connector" SC2.

                  Still can't figure out how to disconnect the "flexible cable" SC20. There's a thin black-top cap thing I can flip up but I don't want to pull on anything and tear it (no idea what I am doing) -- the cable itself doesn't seem to want to disconnect no matter what I do.
                  Last edited by KongRubix; 12-22-2012, 11:58 AM.

                  Comment


                    #10
                    Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                    There's no need to reseat SC20 for the moment; the latch will hold it in place.
                    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


                      #11
                      Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                      Alright, so I've unhooked and re-seated the white connectors and SC2 -- do I put the powercord back in and test?

                      Comment


                        #12
                        Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                        Give it a go.

                        It may be the SC board; according to a training manual for a later generation I found.
                        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


                          #13
                          Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                          When I try to turn it on, still the 7 red lights unfortunately (I can see from underneath)

                          Anyhow, when I turn it on:

                          http://i.imgur.com/NWx34.jpg

                          Area in red starts to hum a bit (normal sounding hum, like a TV turning on, can't tell which part exactly)
                          Hum stops, area in green clicks twice and then the red light on the front of the TV starts to blink.

                          Video:

                          http://www.youtube.com/watch?v=USCegu-r2ug
                          No idea if the sound is sufficient in this though. I'm just pressing the power button on the remote and then moving the camera close to the parts making the sounds.

                          Comment


                            #14
                            Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                            Those all sound normal.

                            I'm not sure what to suggest without using an oscilloscope to check... I doubt you have one .
                            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


                              #15
                              Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                              Haha, indeed not.

                              I'm not sure if I should just consider this a lost cause and buy a new LED TV or something.

                              Was considering http://www.newegg.com/Product/Produc...82E16889102672

                              Comment


                                #16
                                Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                                Avoid Samsung if you buy an LED TV (sorry... but Samsung make poor quality TVs that look pretty on the outside and have a great picture until they die 2 or 3 years later.) But to be honest, LED isn't all it cracked up to be anyway. The picture quality is only slightly better than a conventional LCD and probably worse than a good plasma; and the reliability is generally worse.

                                I'd personally recommend a plasma... maybe an LG if you don't want a Panasonic, even though Panasonic do have some of the best build quality, I'm seeing more and more issues with them. Not sure if it's because they're more popular, or just poorer built. They've definitely cut down to make TVs cheaper, but at least they still use good components and the build quality is second to none.

                                But I still think it's worth repairing.
                                Last edited by tom66; 12-22-2012, 01:14 PM.
                                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


                                  #17
                                  Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                                  Yeah that's why I bought this plasma (heard LED's were overrated, backlit LCD's), but it seems like the picture had better quality (even my plasma had a bit of "graininess" to it whereas the LED's looked sharp and bright).

                                  I'm worried about repairing; looking at
                                  http://hsindependance.hubpages.com/h...-blink-failure
                                  Seems awfully expensive (and I live here in Manhattan where getting someone to come out would be insanely pricey, on top of repairing the hardware)

                                  Comment


                                    #18
                                    Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                                    How old is the set?

                                    Panasonic are quite good with out of warranty repairs...

                                    The grainness of the display is due to the temporal and spatial dithering of the plasma panel, in order to add greyscale levels. The idea is from a normal 10ft distance the dithering isn't visible. Inspecting the panel at close will reveal this. Some cheaper LCDs do this too.

                                    My dad has a 6 yr old NEC 50" plasma (one of the last NEC plasmas made; I fixed it, was last user who shorted the speaker outputs on the rear, and blew up the amplifier board.) hich It looks better than my brother's new 46" Samsung smart-LED which is just too bright and colourful (unnatural -- everyone looks orange, etc.) YMMV.
                                    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


                                      #19
                                      Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                                      I bought this TV in mid-July 2011 (the set itself seems to have been made in June 2011 according to the back-sticker). Warranty has been expired for about 5 months. I had called in to the Panasonic support line, but they told me they couldn't repair since the warranty was up -- but they gave me the address/number of an independent repair service center about a mile away.

                                      Comment


                                        #20
                                        Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

                                        Call them again, tell them you know about the 7 blinks issue, and say you want a repair or replacement. Just as that site says.

                                        17 months? For a 55" plasma? That is ridiculous and they know it. It is a manufacturing defect in the design which has led to the failure. A lot of the "GT" and "VT" series are dying. The older ones used to last 10 years+; they even had 5 year warranties on them for free.
                                        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

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