constant on/off and blinking red light of VT25 Panasonic Plasma

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • xjamesyx
    New Member
    • Jul 2015
    • 5
    • Canada

    #1

    constant on/off and blinking red light of VT25 Panasonic Plasma

    Hey guys,
    I was about to throw my VT25 plasma out after it wouldnt start up and went t.v. shopping and was disappointed that nothing has really improved that much from a picture quality perspective.

    This made me motivated more than ever to somehow come up with a fix for the t.v. which I love still.

    So here's a quick breakdown of the problem. When I plug in the t.v. and turn it on, you can hear a click and the t.v. turns on a connects to the source but then immediately turns off and cycles on and off continuously until you pull the plug. I have tried this several times and the results are always the same.

    SOmetimes though, the unit will stay on and I can watch t.v., but as soon as i try to use a universal remote to change the volume or change the channel via the cable box, the unit will start cycling on and off. I tried to ascertain if there were a certain about of red blinks to diagnose the issue myself, but like i said, it's a continuous cycling process.

    Any thoughts on what the problem may be or which board may be the problem? I had a t.v. tech look at real quick and he said it would cost me $500 to send the "main" board back to japan for repair, but it sounded a bit out there. I took a look at ebay for common boards and there does seem to be some supply so i am encouraged that this might be fixable without the need to refurbish the board in japan.

    I'd appreciate anyone's thoughts or opinions on how I can fix this t.v. THanks all in advance!
  • Moreno83
    Badcaps Legend
    • Jun 2014
    • 2008
    • The Netherlands

    #2
    Re: constant on/off and blinking red light of VT25 Panasonic Plasma

    It sounds like a mainboard problem but 1 thing. The TV tech is not going to send the mainboard to Japan! What he is trying to say is "Im ripping you off for 450$ because the board will cost me 50$".

    My guess its the mainboard. If you open the back cover and search for the board number , you can then search for it on Ebay! Will look like "TNPH0784".
    I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

    Comment

    • xjamesyx
      New Member
      • Jul 2015
      • 5
      • Canada

      #3
      Re: constant on/off and blinking red light of VT25 Panasonic Plasma

      Thanks Moreno. It did seem a bit odd and my b.s. detector was going off in my head. I would have him much rather say local parts + mark up plus time and profit vs some nonsense.

      I'll give that a shot. Too bad these boards are so scarce and the cad dollar is so low. It'll cost me 185 cad just for the main board. Hopefully this does the trick! I'll let you know how i make out.

      Comment

      • tw2005
        Badcaps Legend
        • Oct 2011
        • 6458
        • Australia

        #4
        Re: constant on/off and blinking red light of VT25 Panasonic Plasma

        which model? Do You know there are different revisions of each mainboard which is dependant on the model?

        Comment

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

          #5
          Re: constant on/off and blinking red light of VT25 Panasonic Plasma

          Indeed , tw2005 is right! You need to double check the mainboard model when you buy a new one. ( second hand ).
          Could you post some pictures of the set? Maybe we can help search for the correct board.
          I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

          Comment

          • xjamesyx
            New Member
            • Jul 2015
            • 5
            • Canada

            #6
            Re: constant on/off and blinking red light of VT25 Panasonic Plasma

            shoot.
            i already purchased the board from an ebay vendor. What can happen if you get the wrong revision board number?

            I checked the source t.v. that it came from, and it was from a VT20 plasma which from what i know is almost identical to the one i currently own.

            THoughts on this?

            Comment

            • xjamesyx
              New Member
              • Jul 2015
              • 5
              • Canada

              #7
              Re: constant on/off and blinking red light of VT25 Panasonic Plasma

              Hey guys,
              I installed the board yesterday and the t.v. is back up and running. Thanks all! I just saved $2000 on not having to buy a new T.V. and still get to enjoy the best picture quality under $2k for the next little while. I hope by the time my t.v. finally goes, OLED will have come down in price.

              Comment

              Related Topics

              Collapse

              • Alicat
                Panasonic Plasma TH-50PZ85U No screen No blinks on red power light
                by Alicat
                Hello,

                Stopped by this site trying to fix my parents Panasonic Plasma TV.

                Model number is TH-50PZ85U

                Power comes on and the red power light stays on solid.

                Did a few checks like hold the power button on for 60 seconds, hold the - Volume while holding the menu button, no luck, still@ blank grey screen as the screen lights up very vague.

                I also hear a few clicks.

                I also think my parents said there was a thunderstorm and the TV failed after that.

                Section 6 in the service manual talks about power and no screen,...
                10-30-2024, 10:09 AM
              • ItepK
                Panasonic TX-P42G30E green light blinking, no video, no audio
                by ItepK
                Hey everyone!

                I've gotten this TV for free, neither have it seen a TV repair man, neither have it been opened before.

                This post describes my entire troubleshooting process of this TV.

                When I turn it on using the ON/OFF switch at the side of the TV, the light rapidly flashes green, then it stays on, but it does not react to any of the remote buttons, side buttons, and doesn't play audio.

                I've taken the unit apart, and I've started to check some voltages:

                • On the P11 connector, there is 15V DC only for a brief moment, then it goes
                ...
                12-22-2023, 05:06 AM
              • YasaCh
                Sony kdl 40p5500 red light keeps blinking 3 times
                by YasaCh
                Hello...
                my tv almost 2 years not powerd on and when i turned it on nothing happened and only 3 red light keeps blinking
                i opened the back cover no sign of damage on the powery suply or motherboard
                when i plug in the power i hear the reley sound like tik first and another tik..after that only red keep blinking..
                another thing is even after i unplugged the power, The tv keeps red blinking 3 times for 2 almost 2 munites
                07-07-2025, 11:53 AM
              • jm1234
                Panasonic plasma TX-P42ST50 - 6 blinks
                by jm1234
                Hi,
                anyone able to provide the service manual for old plasma Panasonic TX-P42ST50E?
                It turns off almost immediately (0~5 seconds after pressing the on/off button) and starts flashing the red diode 6 times.
                I disconnected the left-hand side board (SC?, both the ribbon cable and the power cable to it) and also another ribbon going to bottom left board. Then the led signal is 8 flashes. According to service guide to another Panasonic plasma it would mean the left-hand side board is faulty. But I'm not sure it 100% applies to my model.
                I checked that board for any obvious faults...
                05-22-2024, 06:59 AM
              • Fergal22
                Samsung UE40F5300AK blinking red light
                by Fergal22
                Hi,
                I have the above tv that just shows a red light blinking twice 5 times, i have taken the back off and all the capacitors seem ok,
                When i disconnect the mainboard from the PSU all the led's light up blinking fast but as soon as i reconnect the mainboard back to the power supply i get the red light blinking again twice 5 times,
                I have attached pictures of the Mainboard, PSU and a small video (zipped) showing what happens when i disconnect the lead from the psu
                Any help would be appreciated...
                02-02-2023, 09:19 AM
              • Loading...
              • No more items.
              Working...