LG 50pc3d-ud Red vertical lines

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • captain ron
    New Member
    • Jun 2013
    • 5
    • Canada

    #1

    LG 50pc3d-ud Red vertical lines

    I have a LG 50pc3d-ud plasma tv and I have red vertical lines. I would like some info. I have replaced the power board because there were bulging caps. I turned on the tv and I still have the red vertical lines. So I read in here to disconnect the y buffer boards so I did. I first disconnected the top y buffer board from the y sus board and left the little jumper cable between the top buffer board and the bottom buffer board and nothing I still had red vertical lines. So I reconnected the top y buffer board to the y sus board and disconnected the bottom board from the y sus board and turn on the tv and I got top half was picture the bottom had the red vertical lines. So I disconnected the little jumper cable that connects the two y buffer boards and the top half had picture and the bottom half was black. Now I am thinking that I have a bad bottom y buffer am I think right or am I wrong and it is the y sus board? I just want to be a little more clear on this. I would greatly appreciate the info. Here is a picture of what it is doing at the start. I hope I did this right. Thanks Ron
    Attached Files
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: LG 50pc3d-ud Red vertical lines

    Bottom buffer would be my guess.
    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

    • capkid
      Badcaps Legend
      • Oct 2010
      • 1339
      • United States

      #3
      Re: LG 50pc3d-ud Red vertical lines

      You may have a bad mosfet on the bottom buffer board. I had issues with the same buffer board in a 50" Toshiba plasma:

      http://www.coppelltvrepair.com/p/6/r...-buffer-boards

      http://blog.coppelltvrepair.com/2010...-lines-in.html
      LG Plasma Mal-Discharge Correction Service

      Comment

      • captain ron
        New Member
        • Jun 2013
        • 5
        • Canada

        #4
        Re: LG 50pc3d-ud Red vertical lines

        Thanks Tom66 and capkid I will see if I can get another board or get the chips to fix it. It will probably take sometime to get the items I will let you know if I have other problems with this Thanks again Ron.

        Comment

        • capkid
          Badcaps Legend
          • Oct 2010
          • 1339
          • United States

          #5
          Re: LG 50pc3d-ud Red vertical lines

          Originally posted by captain ron
          Thanks Tom66 and capkid I will see if I can get another board or get the chips to fix it. It will probably take sometime to get the items I will let you know if I have other problems with this Thanks again Ron.
          First, I'd test to confirm the failure. Check the Coppell link I provided.
          LG Plasma Mal-Discharge Correction Service

          Comment

          Related Topics

          Collapse

          • howardc64
            A1312 (27” iMac 2009-2011) A1407 (Thunderbolt Display) A1316 (Cinema Display) Display Black Screen Repair
            by howardc64
            Problem

            This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
            08-04-2024, 10:36 PM
          • 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
          • 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
          • howardc64
            TCL 49S405 double image
            by howardc64
            LCD displays a 2nd image slighty offset vertically. And multiple pairs of black lines along the bottom. Probably common as google "TCL 49S405 double image" pulls up this ifixit post ( link ) with identical ( nearly, but their fault seems to be on the other half of the panel than mine ) problem without solution.

            This one looks to be a more difficult to diagnose because most? of TCON seems integrated ( CSOT BGA on buffer baord) into the left panel edge board ( looking from rear of TV) There are 2 buffer boards for each 1/2 of the screen. Main connects to the left buffer board...
            06-23-2025, 03:20 PM
          • iampivot
            Three vertical lines without t-con board connected: Sony 55X8000F
            by iampivot
            I have a Sony 55x8000f that has three vertical lines (three different colors), with the lines still showing when the cable from t-con board to the panel is disconnected. Am wondering what might be causing this? Unfixable panel problem?







            ...
            04-18-2022, 06:41 PM
          • Loading...
          • No more items.
          Working...