Panasonic Plasma TX-P50G10B no picture

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Fentible
    New Member
    • Jan 2018
    • 5
    • UK

    #1

    Panasonic Plasma TX-P50G10B no picture

    Hi Looking for a little help on this issue. I am not an electronics expert but can use a digital multimeter, remove TV back and swap boards safely.

    My sons Plasma so I don't have instant access.

    History: Bought second hand 6 months ago in immaculate condition and perfect working order. Went to switch it on 2 weeks ago but it didn't come on.

    When turned on there is a click and the indicator led flashes for 6 seconds before a brief fizzing sound and the led turns red with rythmic 5 blinking. The panasonic fault diagnosis suggests A board. However perusal of this forum indiates it could be something else.

    Removed the rear cover and switched the TV on, there are no indicator led's on either the SC or the SS boards. I then followed Tom66's helpful guide.

    Unplugged the SS (Z-sus) board, no change to existing conditions. Fizzing sound seems to emanate from the P board

    Plugged the SS board back in and unplugged the SC (Y-sus) board, following changes occur: The SS board led lights up and there is a sharp click (no fizzing sound) before the main TV indicator turns red and flashes 7 blinks.

    Advice from a Panasonic parts seller on ebay suggests that a common fault on these models is shorts across the vs (?) and gnd (ground?) on the SC (y-sus) board.

    I have no clue how to check for the shorts as indicated, is it likely that replacing the SC board for a known good one will rectify this fault? Final option, any recommendations for a trustworthy repair person in the North east of England (Im Gateshead based).
  • freakaftr8
    Badcaps Legend
    • Oct 2012
    • 3743
    • USA

    #2
    Re: Panasonic Plasma TX-P50G10B no picture

    I would say SC board is shorted. Can you take a picture of the SC board and the part number located on it. Should be TNPA****. Look for shorted Mosfets on this board. These are designated with a Q. Check middle pin to each side of the outer pins. Use diode mode on DVM.
    Did I leave the soldering iron on?

    Comment

    • Fentible
      New Member
      • Jan 2018
      • 5
      • UK

      #3
      Re: Panasonic Plasma TX-P50G10B no picture

      Hi freakaftr8

      Thanks for the comeback. Sorry I don't have any pictures but the SC board number is TNPA4782AB.

      I can use diode mode but unsure how to identify a mosfet on this board.

      Comment

      • freakaftr8
        Badcaps Legend
        • Oct 2012
        • 3743
        • USA

        #4
        Re: Panasonic Plasma TX-P50G10B no picture

        They stand up and are screwed into the aluminum heat syncs. Here is a picture of most likely some or all the parts failed on that board. If you feel comfortable with soldering you could try to give it a go, but This is a very hard board to work on. Best thing would be to send it out for repair or Stage for a repaired board.
        Attached Files
        Did I leave the soldering iron on?

        Comment

        • Fentible
          New Member
          • Jan 2018
          • 5
          • UK

          #5
          Re: Panasonic Plasma TX-P50G10B no picture

          Thanks for that Freakaftr8, Im going with a replacement board, I can solder but advice I have had suggests its a difficult board to repair. I'll post once Ive procured and fitted a suitable SC board

          Comment

          • dj01fad
            Senior Member
            • Sep 2014
            • 92
            • romania

            #6
            Re: Panasonic Plasma TX-P50G10B no picture

            check the buffers first! if you have a bad buffer it's possible to burn a good sc board.

            Comment

            • Fentible
              New Member
              • Jan 2018
              • 5
              • UK

              #7
              Re: Panasonic Plasma TX-P50G10B no picture

              Thanks for stepping in dj01fad, yes I was aware that a bad buffer might damage a new SC board. Unfortunately Im not sure how to check those so am going to get a pair of known good ones. Thanks forthe reminder

              Comment

              Related Topics

              Collapse

              • Tynan Dill
                Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                by Tynan Dill
                I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                Upon bringing it home and plugging it up, it showed a standby light.

                I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                The screen seems to blackout and stay black, but with a flashlight I can see the display.

                With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                Assuming...
                11-22-2024, 01:46 PM
              • 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
              • m1ch43lzm
                HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
                by m1ch43lzm
                Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
                Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
                05-12-2025, 08:37 PM
              • sam_sam_sam
                Panasonic switching power supply daughter board has two 27uf @ 50 volt capacitors which I do not keep in stock
                by sam_sam_sam
                I did not have any 27uf @ 50 volt capacitors but one nice thing is that it has enough room for two capacitors in parallel a 22uf and a 4.7uf @ 50 volts 22 plus 4.7 equals 26.7uf which so very close to 27uf I will show some pictures of it sometime tomorrow

                This is one of the shit est boards I seen in a very long time and it was the daughter board the traces just lifting off the board I had to use the capacitor leads to repair the the traces and the main board is not any better because I had to repair several traces for the daughter board to the main board

                After all of...
                07-13-2024, 08:14 PM
              • canadaboy25
                Panasonic TC-P54VT25 No image. A or D board?
                by canadaboy25
                I have a Panasonic TC-P54VT25 that will power on and prime the display but there is no image at all.

                The panel is primed as there is a slight glow from the entire panel. This means the problem should be logic related. The service manual also confirms this and recommends replacing the A or the D board.

                I have tried to get the TV to display the test sequence but I have been unable to and I don't even know if this TV has a test sequence or not. I tried following tom66's instructions in post #3 on this thread https://www.badcaps.net/forum/showthread.php?t=26790. There was...
                01-17-2021, 01:06 AM
              • Loading...
              • No more items.
              Working...