Panasonic TH-PX60U is completely dead.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • ruatha65
    Member
    • Nov 2014
    • 12
    • United States

    #1

    Panasonic TH-PX60U is completely dead.

    I have an issue with my TH-50PX60U. It is completely dead. No lights, no blinks, just kaput. I found a troubleshooting manual that Tom66 had posted, and it led me to either a bad P board or bad DG board. Here is the quandry, which board is it?

    At first, I thought the issue was simple (like you all haven't heard that one before!). My kids used the on button on the set often when the tv remote lost power, so i figured either the button itself had worn down or the switch board was bad. Button was fine, and I replaced the board, still no fix.

    I tested the power cord, the wall outlet and the transformer, all are good.

    AC relays did not click when power cord was put in, so went to step 2 on the troubleshooting guide, which was to test if either pin 1 of PA40 or pin 1 of HC22 had 5V. PA40 had 0V, but HC22 had 5V. The problem is, HC22 had nothing plugged into it.

    According to the guide, if I answer the "or" proposition above with a "yes" since one of the two had 5V, it's the DG board. If the answer is "no", it's the P board. My question is, does it matter that HC22 connects to nothing at all? Simply because it has 5V and PA40 has nothing, should I assume it's a DG board?

    I had added this post to another thread, and TW2005 suggested that I start a new thread for others with similar issues in the future. Since I'm a newbie and just now allowed to start threads, here it is.
  • ruatha65
    Member
    • Nov 2014
    • 12
    • United States

    #2
    Re: Panasonic TH-PX60U is completely dead.

    To update a bit on where I am so far, TW2005 posted a thumbnail that seemed to indicate the issue was a P board, but that may have been from a newer unit. He also provided some helpful Powerpoint tutorials, which included steps to take once a new P board is installed. At this point, I plan to replace the P board and see where that leads me. If anyone has any other suggestions or requires a photo of the open unit, I'd be more than happy to oblige..
    Last edited by ruatha65; 11-02-2014, 04:19 PM.

    Comment

    • ruatha65
      Member
      • Nov 2014
      • 12
      • United States

      #3
      Re: Panasonic TH-PX60U is completely dead.

      I installed the P Board today and the TV is still dead. I'm going to try replacing the DG board, which is what the original troubleshooting flow chart told me was the issue.

      Comment

      • ruatha65
        Member
        • Nov 2014
        • 12
        • United States

        #4
        Re: Panasonic TH-PX60U is completely dead.

        Latest update: I installed the DG board today. Panasonic makes access to the DG so much fun (sarcasm)! They stack another bracket and circuit board on top of it.

        After installation, I plugged the unit in and heard relays, for the first time since it died. Flipped it over and the on switch gave me a red LED (solid, no blinks of death). Used the remote and got an input display on the screen. Plugged cable box in, and got the best picture I've seen on it for years. That DG board must have been dying for some time.

        Keeping fingers crossed, and I'll be monitoring it to be sure no other issues crop up while in use for a few hours, but it looks good so far.

        Thanks Badcaps.net for all of the help. Specifically, the guides provided by Tom and TWC2005 were amazing and lead me to the fix. This is an awesome site that is now in my bookmarks. I was able to repair a plasma tv for about $160 (even including the P board I didn't need), so I saved at least $500-$600 on a new set. Not only that, but I enjoyed the challenge.

        Thanks again everyone. What a great community!
        Last edited by ruatha65; 11-10-2014, 09:59 PM.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: Panasonic TH-PX60U is completely dead.

          Nice fix... I'm surprised you noted a picture quality difference - maybe the customer settings were different.... It can't otherwise effect the picture quality.
          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

          • ruatha65
            Member
            • Nov 2014
            • 12
            • United States

            #6
            Re: Panasonic TH-PX60U is completely dead.

            Two possible reasons for the picture quality, neither of which have anything to do with real engineering or electronics:

            1. I was so excited that I actually fixed it that I saw more than what actually appeared on the screen.

            2. It has been dead for so long that ANY picture looked perfect.

            Oh, and the most likely reason is that I upgraded my cable service while the set was dead, so I had an HDMI capable cable box and used an HDMI cable for the first time on the TV.

            Comment

            • tw2005
              Badcaps Legend
              • Oct 2011
              • 6458
              • Australia

              #7
              Re: Panasonic TH-PX60U is completely dead.

              Or maybe you had a bad LVDS cable connection too?

              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
              • 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
              • k370
                Yoga3 Pro-1370 Board NM-A321 DEAD no power at all
                by k370
                Hi everyone,

                I have a NM-A321 board that is dead, with no power at all.

                When I received the laptop, the +5VPMIC line was shorted. Removing the PU3 (ISL95905) solved the short, so I ordered and replaced the ISL.

                With the new ISL, the short is gone, but still no voltages at all. I measured the following rails:
                • +3VALW
                • +5VAUX
                • 1.2VSUS_PWRGD
                • 3VALW_PGD
                • 1.05VAUX_PWRGD

                Additionally, the ISL95906 (PU3) is not getting any voltage on the VIN rail.

                The only place on the board where I find any voltage is on the first MOSFETs, specifically:...
                09-23-2024, 11:57 AM
              • 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
              • Loading...
              • No more items.
              Working...