Samsung TV model UE50TU: rebooting, backlight, sound, but no picture

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  • TR103
    New Member
    • Jan 2025
    • 3
    • Netherlands
    #1

    Samsung TV model UE50TU: rebooting, backlight, sound, but no picture

    Hi, I have a Samsung UE50TU with:
    - sound and backlight, but no picture
    - when it arrived, it had a picture for a few seconds
    - it keeps rebooting
    - without ribbon cable between the two panel boards, it does not reboot but I have no picture
    - without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
    - when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.

    - without cable between mainboard and lcd panel and with a jumpered mainboard, it does not reboot and I do have 25V VGH. With the cable connected the VGH drops to 0V. But with the lcd panel connected, it keeps rebooting, even without the ribbon cable (without the jumper it does boot without the ribbon cable)

    Does anyone have any ideas? Is there something else I can test? I know this tv is known for its bad panels, but when I tape off all the clock-signals, it still reboots with no picture. I would like to know what is wrong with it, and why only taping off pin1 (the innermost pin) is the only pin that keeps it from rebooting. The signal on pin1 could be FB_2 (I found this somewhere else on this forum). But what is FB_2? I am ok with writing this tv off, but I would like to learn more, what exactly is the problem?​
    Tags: None
    • EazyBone
      Badcaps Legend
      • Jun 2023
      • 1321
      • United states
      #2
      Screen dies. These 50 inchers are crap.

        Comment

        • handsworth
          Senior Member
          • Oct 2015
          • 174
          • United States
          #3
          Try this tape off. It got me a picture on a 50TU
          1 Photo

            Comment

            • TR103
              New Member
              • Jan 2025
              • 3
              • Netherlands
              #4
              Originally posted by handsworth
              Try this tape off. It got me a picture on a 50TU
              Thanks handsworth! I haven't tried specific that combination, but one of my tries covered more and even then it won't boot. Here are some photos what I tried already. I also tried covering just pin1 (=innermost pin, not on photos), and that is the only way to get it booting, but no picture.
              3 Photos

                Comment

                • EazyBone
                  Badcaps Legend
                  • Jun 2023
                  • 1321
                  • United states
                  #5
                  Sometimes tape doesn't work and really can't do anything about it. Could be damaged to screen you haven't seen

                    Comment

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