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
    Tags: None
    • 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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