Samsung UN65H8000AFXZA Backlight No Image

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  • Psi
    Member
    • Feb 2019
    • 10
    • usa

    #1

    Samsung UN65H8000AFXZA Backlight No Image

    I have a Samsung UN65H8000AFXZA that I got from a friend a year ago. The Backlight comes on but no image. When I connect it to my laptop it picks it up as a 1080p 60hz monitor that I can use as a secondary so the logic board seems fine. I have checked all the voltages and they seem to make sense. I got a replacement tcon board but the problem persists. On the tcon board I am getting 2 of 3 leds lit up. I have tried unplugging 1/2 of the tcon to get half the panel working and tried taping over some pins. If anyone has a service manual or anything that can be helpful please post. Also if you want exact voltages ask away.
    Thank you.

    T-Con Part# BN95-01595A
    Power Supply Part # BN44-00743A
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Samsung UN65H8000AFXZA Backlight No Image

    So either one of the cable between the LCD panel and the T-CON connected you will get each half of the screen to work?
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

    Comment

    • Psi
      Member
      • Feb 2019
      • 10
      • usa

      #3
      Re: Samsung UN65H8000AFXZA Backlight No Image

      Sorry didn't make that clear but I couldn't get either side of the screen to work and had 2 of 3 leds each time.

      Comment

      • Psi
        Member
        • Feb 2019
        • 10
        • usa

        #4
        Re: Samsung UN65H8000AFXZA Backlight No Image

        So today I got some freeze spray (compressed air) and decided to spray it around the part that I thought was good the main board and I got 3 light on the tcon board briefly and some white lines on the screen. But now I am getting power loops where the tv backlight comes on and promptly off. The highlighted part of the image is where I sprayed it.

        Mainboard Part# BN94-07389D
        Attached Files

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