Samsung LN52B550K1F no backlight has picture has sound

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  • Ierwin
    Samsung UE60KU6079 backlight okay mainboard responsive, no picture, no sound
    by Ierwin
    Hello everyone,
    Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
    The previous owner stated that there had been white dots on the screen which from the description sounded like some lenses fell of the backlight LEDs.
    He had opened the TV from the back, trying to get to the backlight, supposedly gave up, reassebled everything and gave the TV to me.
    I expected the worst like ripped COF cables or a cracked panel but could not find anything like that yet.
    Anyway I still fully expect that there has been something seriously damaged...
    05-13-2025, 03:31 PM
  • TR103
    Samsung TV model UE50TU: rebooting, backlight, sound, but no picture
    by TR103
    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...
    01-22-2025, 04:12 PM
  • Mgiffune
    Samsung UN60EH6000F Black Screen, Backlight and Sound Good. Power Cycle Returns Picture
    by Mgiffune
    I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.

    I ordered a supposedly ‘new' Tcon board this time, and    ...
    06-09-2024, 10:28 AM
  • gl4709
    Samsung un55cu7000d with backlight and sound No Video / Picture
    by gl4709
    I am working on a Samsung un55cu7000d which has backlights and audio. There is no picture. This model does NOT have a separate TCON board. Before I order a main board I would like to try and confirm that the issue is not in the display. The ribbon cable from the main board goes directly to the display and I can then disconnect the left from the right. When I disconnect the right side the display lights up on one side but has no video being displayed. Can you all give me some guidance on how to confirm the main board is the issue.
    01-23-2025, 06:21 PM
  • LaPCon_IT
    Samsung UE50TU7099U no picture no sound, backlight present
    by LaPCon_IT
    TV has one combo board (VTT55UH160). Symptoms are like this.


    When part of the screen is disconnected (white part), it looks like this

    Resistance and voltages (I don't know if they are good or not). The inductor with 0ohm/0V seems to be connected to GND.


    I haven't noticed any shorts on rails listed below:

    VGH - 30V
    VGL- -9V
    VAA - 14V
    VCOM - 5.6V
    STV - 11.95V
    LC1, LC2 - +30/-12V

    All CKV lines (no shorts between them) looks the same:


    I've tried to cover some lines with...
    7 Photos
    12-15-2023, 03:55 AM
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