panasonic tx-p55vt30 and tx-p55st60 problems.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • dj01fad
    Senior Member
    • Sep 2014
    • 92
    • romania

    #1

    panasonic tx-p55vt30 and tx-p55st60 problems.

    Hello all.

    I have a chance to get for a good price a tx-p55vt30 and a tx-p55st60 plasma TV's. the problem is:
    - on the 55vt30 - it starts and remains on black screen. it has audio and changes programs from the remote. the seller says that in a dark room you can see that the screen is powered
    - on the 55st60 - on start relay clicks, or rarely it starts. it displays the image, but is not responding to the remote, and you cannot change the program. the front led is completely off...

    it's ok to buy them? what are the chances to have a bad panel on the vt30? on the st60 I know that is possible to have an A-board problem or around it (the front pcb with the remote sensor and led maybe)
  • tw2005
    Badcaps Legend
    • Oct 2011
    • 6458
    • Australia

    #2
    Re: panasonic tx-p55vt30 and tx-p55st60 problems.

    Tough to say, I'm thinking A-board on the st60. the VT30, a bit sus on that. I think you will have to have a look and judge yourself. Could also be A board if it's on, no fault codes and has sound.

    Same seller both TVs?

    Comment

    • dj01fad
      Senior Member
      • Sep 2014
      • 92
      • romania

      #3
      Re: panasonic tx-p55vt30 and tx-p55st60 problems.

      yes, same seller. the price is 100 Euro for each. he doesn't have spare parts, but another friend has a whole 55vt30 with a broken screen... for the st60 I do not have spare parts, but I'll try to heat the board; it worked for me on 2 A-boards from gt30 TV's.
      he also has a LG 50PA6500 with y-sus board broken on 65 Euro.
      I think I'll buy all of them, and hope I'll fix at least one. hahhaha

      Comment

      • tw2005
        Badcaps Legend
        • Oct 2011
        • 6458
        • Australia

        #4
        Re: panasonic tx-p55vt30 and tx-p55st60 problems.

        In my currency that seems a lot of money. I get suspicious, if they're into fixing but ditching them. have they damaged anything inside or tampered to hide a fault.

        I've had a couple where power supplies had been disconnected or tampered to hide faults.

        I think important thing with the GT30 is the panel ok? Hopefully you can tell if it's being powered or not. It could be possible to disconect enough so the TV turned on and produced sound , no image.

        Good luck with it.

        Comment

        • dj01fad
          Senior Member
          • Sep 2014
          • 92
          • romania

          #5
          Re: panasonic tx-p55vt30 and tx-p55st60 problems.

          100 EUR = 150 AUD; You think It's expensive for this price?
          I know this man, I trust him, and I know he did not anything wrong to these sets; he is not a repair man, and this is just a hobby for him (like in my case). he told me that on the vt30 the screen is powered, and you can see it if it's dark in the room. I'll go for them on saturday, and I'll take with me an A board for the VT30. He will let me try whatever I want, so I guess it's OK.
          Last edited by dj01fad; 06-27-2017, 02:20 PM.

          Comment

          • tw2005
            Badcaps Legend
            • Oct 2011
            • 6458
            • Australia

            #6
            Re: panasonic tx-p55vt30 and tx-p55st60 problems.

            Originally posted by dj01fad
            100 EUR = 150 AUD; You think It's expensive for this price?
            I know this man, I trust him, and I know he did not anything wrong to these sets; he is not a repair man, and this is just a hobby for him (like in my case). he told me that on the vt30 the screen is powered, and you can see it if it's dark in the room. I'll go for them on saturday, and I'll take with me an A board for the VT30. He will let me try whatever I want, so I guess it's OK.
            Well that's different then. yeah, for here broken too much but then you have to be lightning quick to find one they get snapped real quick and often $50 -100 AUD or free sometimes.

            Comment

            • kc8adu
              Super Moderator
              • Nov 2003
              • 8832
              • U.S.A!

              #7
              Re: panasonic tx-p55vt30 and tx-p55st60 problems.

              no pic but glow in dark room means sus,buffers,power supply ok.
              main board failure.
              i have reflowed a few of these myself.
              and installed a better heatsink on the asic.
              could be the problem on both sets.

              Comment

              • dj01fad
                Senior Member
                • Sep 2014
                • 92
                • romania

                #8
                Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                I reflowed some myself too, and they work fine with a laptop cooler installed...
                I'll get them tomorrow. wish me luck
                Last edited by dj01fad; 06-30-2017, 02:43 AM.

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                  Originally posted by dj01fad
                  yes, same seller. the price is 100 Euro for each. he doesn't have spare parts, but another friend has a whole 55vt30 with a broken screen... for the st60 I do not have spare parts, but I'll try to heat the board; it worked for me on 2 A-boards from gt30 TV's.
                  he also has a LG 50PA6500 with y-sus board broken on 65 Euro.
                  I think I'll buy all of them, and hope I'll fix at least one. hahhaha
                  Don't get the PA6500, probably a bad 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

                  • dj01fad
                    Senior Member
                    • Sep 2014
                    • 92
                    • romania

                    #10
                    Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                    Originally posted by tom66
                    Don't get the PA6500, probably a bad panel...
                    he said that after disconnecting the supply from y-sus the TV came alive with sound.
                    if you say that... then I won't get it...
                    Thanks.

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #11
                      Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                      Originally posted by dj01fad
                      he said that after disconnecting the supply from y-sus the TV came alive with sound.
                      if you say that... then I won't get it...
                      Thanks.
                      There's a common issue on these where the panel kills the upper buffer, well technically it's the screw mount for the case rubbing into the ribbon cables but it's all the same as you can't change those.
                      I'm not sure if it kills the Y sus as well, might do, might not, so could be another fault, just be aware there's a chance it's the 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

                      • dj01fad
                        Senior Member
                        • Sep 2014
                        • 92
                        • romania

                        #12
                        Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                        I can take a look inside on it. if it's the rebbon I should see something wrong... If I won't be able to see anything wrong, it still can be the panel?

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #13
                          Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                          Originally posted by dj01fad
                          I can take a look inside on it. if it's the rebbon I should see something wrong... If I won't be able to see anything wrong, it still can be the panel?
                          It is really hard to see the damage but the top left ribbon from the top buffer board tends to get a slight kink in it which is the death of the panel.
                          It probably isn't the panel if this isn't the case, excepting the obvious cases of stuck vertical lines, which LG's are somewhat known for, but reasonably rare.
                          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

                          • dj01fad
                            Senior Member
                            • Sep 2014
                            • 92
                            • romania

                            #14
                            Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                            OK, it's a no-go. just the pannys should be enough )

                            Comment

                            • dj01fad
                              Senior Member
                              • Sep 2014
                              • 92
                              • romania

                              #15
                              Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                              Hello there,
                              The vt30 shows the same dark screen with my good A board. The screen is powered, and when I turn it off from remote I can see that the screen comes a little lighter. No buzz sound.
                              Any ideas? It's possible to have a sc-board issue?

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #16
                                Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                                Do you have an oscilloscope?

                                Check Vad, Vscn, and Vsus

                                Approx -200V, 150V and 210V each.
                                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

                                • dj01fad
                                  Senior Member
                                  • Sep 2014
                                  • 92
                                  • romania

                                  #17
                                  Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                                  At that moment I was at the seller's place; I took for me only the 55ST60, because I am sure it's just the A board: sometimes it comes alive and displays picture, but doesn't respond to any command, from the panel or remote. I took also the 55VT30, but for a friend, not to keep it. I measured those with a multimeter and the values were near what you say with one exception. If I remember correctly, Vsus vas 209, Vad and Vscn were 204 and 180, or some like this. I can check again tomorrow because the TV will stay a week or two at my place until my friend comes to get it... it's strange because I remember that when I was testing a 50GT30, and forgot to connect the A board to the SS board, the TV started on solid green LED, but and I received a beautiful black and dark screen. same case here, but the little led on the SS is now green (55vt30), and on my test (50gt30) it was not. I hope it's not the panel, and I cannot see how it can be...

                                  another question: I think I might have an A board from a 42ST60. do you think it's ok to use in a 55 set? I know that this is not possible at 30 series...

                                  if possible please edit post #3: in the end the VT30 was 150E and the ST60 was 220E. it was a misunderstanding with the price... the LG 50PA6500 was the one at 100E, but it was not for sale anymore (strange thing right?).
                                  Last edited by dj01fad; 07-01-2017, 02:48 PM.

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #18
                                    Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                                    Don't use the wrong panel size board, could cause damage.

                                    A plasma panel works by AC discharge. You will not get any light out from it if the A board is not sending the control signals to the SC/SS boards. In other words, it won't glow on its own.
                                    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

                                    • dj01fad
                                      Senior Member
                                      • Sep 2014
                                      • 92
                                      • romania

                                      #19
                                      Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                                      Originally posted by tom66
                                      A plasma panel works by AC discharge. You will not get any light out from it if the A board is not sending the control signals to the SC/SS boards. In other words, it won't glow on its own.
                                      Yes, but it's hard for me to belive that it's the panel... In 99% cases a bad panel has another behaviour.

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK

                                        #20
                                        Re: panasonic tx-p55vt30 and tx-p55st60 problems.

                                        I didn't say it was the panel. I said it could be something else, including a faulty A board. But a lack of glow could mean many things. It's hard to say. Panasonic sets (and plasmas in general) are hard to diagnose without an oscilloscope.
                                        Last edited by tom66; 07-02-2017, 04:41 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

                                        Related Topics

                                        Collapse

                                        • stecos
                                          Panasonic Plasma main board repair (ST30 GT30 VT30 ST50 GT50 VT50),LED with 3 blincks
                                          by stecos
                                          Hi everyone!
                                          I happened several times, in the search for help from the web, to consult this very interesting forum.
                                          So I decided to sign up and I intend to participate actively by making available my knowledge and experience on the subject, I'm a new user but at the same time I'm old in the sense that I have 4 decades of experience in repairing and designing electronics but above all I'm a great passionate about the subject.

                                          Having said that I come to the gist of my post on the forum as the title suggests.
                                          For my passion for technology I'm now collecting several...
                                          11-28-2022, 11:39 AM
                                        • Andre Gilbert
                                          Panasonic TC-P55ST50 8 blinks then no blinks
                                          by Andre Gilbert
                                          Hello! yes I know there is already lots of information about this issue. I have a Panasonic TC-P55ST50 that originally displayed an 8-blink error code. Following the troubleshooting flowchart, I ended up replacing the SS board. However, even after replacing it, the issue persists. The TV turns on and stays on without displaying an image, and continuity is confirmed on all connectors. What am I missing hereπŸ€”?
                                          Ok Im a mechanical engineer ...but I thought I was able to follow a rather simple flowchart for electric troubleshooting πŸ˜‚.

                                          TV Model: Panasonic TC-P55ST50
                                          ...
                                          11-20-2024, 08:52 PM
                                        • jean luc ferre
                                          laptop hp g72 b52sf screen problems
                                          by jean luc ferre
                                          Hello,
                                          on this laptop hp g72 b52sf i have screen problems as you can see with the photo joined in attachments.
                                          the used graphic card is "intel hd graphics" and the id of the integrated screen is : "monitor/SEC3354".
                                          i verified the driver of the pΓ©ripherals and they are ok. i verified the definition and settings of the graphic card and of the screen : definition 1600x900 and refreshment frequency :60hz. (they are the sames for the graphic card and the screen).
                                          i don't understand the reasons of the white stripe at the bottom of the screen below the task...
                                          06-07-2025, 03:27 PM
                                        • Hondaman
                                          USB problems?
                                          by Hondaman
                                          Recently I discovered my SSD died (OCZ/Toshiba 240 GB). It was in a USB enclosure, attached to the Linksys WRT-AC1200 router. Since then I removed the USB enclosure and attached it to my Win7 PC (AMD 8150 CPU, 970 chipset, 64 GB RAM). I also gathered one or two other USB enclosures to figure out what is going on.

                                          (I suspect that I lost quite a few MP3 and FLAC files I recently ripped from my audio CDs, I think I lost very little un-replaceable stuff.)

                                          I think it is IMPOSSIBLE for Win7 to have any problems with a USB enclosure as long as Win7 knows how to speak to the...
                                          08-12-2024, 03:26 PM
                                        • clabr
                                          Lenovo 11e problems (any sata hdds are not recognized, sleep battery drain)
                                          by clabr
                                          Need help to solve some problems with this laptop.

                                          After working in bed with it one night and heating up too much (probably the cause of this problems) the sata HDD OS windows froze
                                          After restart the original Sata HDD was not recognized anymore (but works fine in other laptops or PCs)

                                          Tried connecting other good Sata 2.5 HDDs but not one is working in this laptop anymore (not the original nor others)

                                          Before this had happened I observed some other problems:
                                          When I tried replacing original mecanical HDD with a SSD HDD could not get them...
                                          12-02-2021, 08:09 AM
                                        • Loading...
                                        • No more items.
                                        Working...