LG 49UB850V Start Up Issue

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  • Andi29681
    New Member
    • Feb 2025
    • 8
    • USA
    #1

    LG 49UB850V Start Up Issue

    Hello Community,

    I‘m Andi and I have some issues with my LG 49UB850V.


    My TV turns on and the LG Logo appears for 1 sec.
    After that the TV screen stays black but the backlight stays on.
    No reaction on the remote or knob. I can’t open the menu.

    The 2 LEDs on the Mainboard stay constant red.
    If I plug in a usb drive with current firmware the TV detects the flash drive and I get a notification on the screen to install the firmware. I can't install a new firmware. It looks like the menu is frozen.

    Do you have any ideas?
    7 Photos
    Last edited by Andi29681; 02-23-2025, 08:41 AM.
    Tags: None
    • Diah
      Badcaps Legend
      • Feb 2013
      • 6376
      • Germany
      #2
      Originally posted by Andi29681
      If I plug in a usb drive with current firmware the TV detects the flash drive and I get a notification on the screen to install the firmware. I can't install a new firmware. It looks like the menu is frozen.
      at the same way try use usb mouse or air mouse to see if it response for upgrade matter. even try reduce load by disconnect WIFI / BT

        Comment

        • Andi29681
          New Member
          • Feb 2025
          • 8
          • USA
          #3
          I plugged in an other usb device and it gets power.
          It looks like that the TV operating system is not starting up.

            Comment

            • Nugzzy
              New Member
              • Dec 2024
              • 9
              • Portugal
              #4
              Hi

              Attached is the Service Manual

              It may help you or others - good luck with the repair!

              Cheers
              Attached Files

                Comment

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