Slight backlight problem after replacing main AV card on LG 65UB680

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • marekk
    Member
    • Mar 2013
    • 36
    • UK
    #1

    Slight backlight problem after replacing main AV card on LG 65UB680

    Hi,
    I was struggling to find replacement of the main AV card for 65" LED LG TV 65UB680 and finally I have purchased main board for 79" model 79UB680.
    Board does fit and works except slight problem with backilight at startup where two bit darker bands are visible. As soon as picture is displayed fault is not visible. I believe that such fault is caused by different firmware design for bigger screen.

    Could you let me know how to access service menu on that model to change screen size?

    I have tried common metods like "Press and hold <OK> buttons on remote as well as TV panel for a few seconds" and none of them worked for me.

    Do I need service remote?

    I will appreciate a lot any help.





    https://ibb.co/S7F2KcL
    https://ibb.co/zJCD0xJ
    Last edited by marekk; 06-23-2021, 08:55 AM.
    Tags: None
    • neilc6
      Badcaps Legend
      • Nov 2015
      • 1550
      • Canada
      #2
      Re: Slight backlight problem after replacing main AV card on LG 65UB680

      You need a LG service remote to enter service menu or a cellphone with IR and an app that can send the "INSTART" command.

        Comment

        Previous template Next

        Related Topics

        Collapse
        • Rofix
          Problem HP Main Board DAG3DCMBCC0 REV C
          by Rofix
          Hello everyone I wanted to kindly ask you for advice I have a problem with this HP Main Board DAG3DCMBCC0 REV C motherboard, the PC does not turn on, the power connector works, 19V arrives, on the first three mosfets there are 19V, the main voltages such as 3.3V and 5V are on the various coils, on the power button 3.3V arrives, I checked the power button and it works, but the PC does not turn on, moreover when I connect the power supply to charge the battery it does not charge, no LED lights up at the moment as the voltage is at 14.7V, the nominal voltage written on the battery is 15.4V, I also...
          12-19-2024, 02:10 PM
        • ygorsan
          LG 55NANO77SRA TV ā€“ Menu scrolling by itself even after removing button board (Main Board EBU66792103)
          by ygorsan
          Hi everyone,




          Iā€™m looking for help with a persistent issue on an LG TV model 55NANO77SRA, which uses the main board EBU66792103 (also used in LG UQ80 and NANO75/NANO80 series).







          šŸ§© Problem Summary:
          • The TV keeps scrolling through the menu or selecting items by itself.
          • I removed the physical button board (the entire panel with power and volume buttons) and also disconnected the flat cable (CN202) from the main board.
          • The remote control is not in use (batteries removed), and the TV still shows the same behavior.
          • I
          ...
          07-28-2025, 08:34 AM
        • mmccomputer
          problem with replacing lcd screen
          by mmccomputer
          I have an HP model : 14-cf0011nf and I want to change its display screen (it has an original 14" full HD TN 30 pins panel) which works without problem but I want to put another screen with an IPS panel, the problem is that I tried several screens but there is no display except with the original screen, I never had this problem before I changed hundreds without problems but this PC is not 'accepted than its original screen
          otherwise on the motherboard it displays edp and I don't know, do the panels I tried only work with the LVDS protocol?
          If anyone has any information on the subject...
          12-15-2024, 03:44 PM
        • cheeky2
          Is it possible to upgrade from a Vestel 17MB97 main board to a 17MB110 Main board?
          by cheeky2
          I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
          Obviously the same LVDS connector for the screen connection...
          05-25-2024, 03:27 AM
        • bcstedt
          Samsung PN50C540G3FXZA 50" Plasma, power cycling, Y-Main problem, Canada
          by bcstedt
          Just starting to crack into this one and wanted to get the ball rolling.

          At power on (plug in), power light on, relays click, repeat (sometimes)

          After disconnecting Y-Main from SMPS power stays on and boot up jingle is heard from speakers

          Removed Y-Main for inspection and testing

          This pic from:
          PN50C540G3FXZA Fast Track Troubleshooting Manual - Rev 1/10/12
          ...
          12-15-2023, 10:30 AM
        • Loading...
        • No more items.
        Working...