New LG OLED no display

Collapse
X
Collapse
 
  • Page of 3
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • dick_barton
    Badcaps Legend
    • Aug 2015
    • 6642
    • Wales
    #41
    Re: New LG OLED no display

    In post #3
    There seem to be 3 control lines, Pwr_On which obviously turns on the main voltages. Then there are 2 more, ACD straight across from the Pwr_On, and also DPC in the upper left top pin. DPC measured around 3.8V but unfortunately I did not get a reading on DPC because I didn't notice it until just now. I have the power board in front of me but the rest of the TV is across town. Thanks much for the reply, and any suggestions are greatly appreciated.
    Unfortunately I don't know what DPC means either.
    Maybe a Protection Signal?
    Last edited by dick_barton; 06-27-2021, 04:33 AM.
    Willing to help but I'm no expert.

      Comment

      • ThomasX
        Member
        • Jun 2021
        • 15
        • Sweden
        #42
        Re: New LG OLED no display

        I checked the power PCB and can conclude the DPC is an input signal to the power board. It controls at least a couple of things, one via an optocoupler.

        Question is what it controls. Anyone got any clue?

          Comment

          • Cento50
            New Member
            • Oct 2022
            • 6
            • Italy
            #43
            Re: New LG OLED no display

            Lg oled 55b6v
            Hello friend thank you for register to this forum.
            I have this problem.

            1- 24v go to 0v If have connected 4 flat cable panel and TV have only audio. And result D18 shorted.

            If disconnect 24v cable to tcon have this: TV on only audio. And result d18shorted.
            Vpres have short circuits, if disconnect 4 flat cable the diode D18 result good.
            Vpres is shorted and connected to tcon lock the 24v in protection. Have solution for investigate this little board?

            Thank s
            Attached Files
            Last edited by Cento50; 10-11-2022, 07:36 AM.

              Comment

              Previous 1 2 3 template Next

              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...
                ORIGINAL POWER SUPPLY BOARD
                7 Photos
                11-22-2024, 01:46 PM
              • 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
              • randaz81
                problems with LG OLED 55EC930V, t-con board LC550LUD-LGP1
                by randaz81
                I have an LG OLED 55EC930V.
                The problem started a couple of days ago: tv working, but no video, only audio.

                I opened the tv and I checked the parts. The mainboard has the red led on, which means that it working correctly. The power board supplies 24V correctly.

                I focused my attention on the t-con board, LC550LUD-LGP1, I disconnected it to observe it carefully, no signs of damage. Then I mounted it again and I reconnected to the tv.

                After this, the tv started to show a different behavior: it turns on and then, after few seconds, it turns off....
                10-05-2021, 08:41 AM
              • Document Archive
                Gigabyte AERO 15S OLED SA-7JP5130JP Notebook Specification for Upgrade or Repair
                by Document Archive
                This specification for the Gigabyte AERO 15S OLED SA-7JP5130JP Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 15S OLED SA-7JP5130JP boardview and 15S OLED SA-7JP5130JP schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification,...
                09-06-2024, 02:24 PM
              • Hakuu
                LG OLED77G1PUA - No Video / Audio after a TCON Board change and Software Update
                by Hakuu
                Hi There,

                This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.

                After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.

                More Details

                TV Model - LG OLED77G1PUA

                Got the same exact TCON board from TVPartsToday and replaced it. But didnt transfer the EPPROM data (didnt...
                07-12-2023, 02:37 PM
              • Loading...
              • No more items.
              Working...