Samsung LCD TV no picture backlight on no 12v at tcon

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  • shelby5041
    Badcaps Legend
    • Feb 2009
    • 1505
    • united states of america usa
    #1

    Samsung LCD TV no picture backlight on no 12v at tcon

    hi
    i have a samsung lcd tv

    it powers on with sound and backlight but no picture

    all voltages from PS are good 12v 3.3v and 5v

    whats odd is that at the tcon i tested voltage across the fuse on the tcon and i get 0v

    i figured main board issue..so i ordered a used main board....when i put replacement main board in i still have same issue

    no 12v at the tcon fuse

    i disconnect the panel ribbon cables to rule out any panel issues and i still have no 12v at the tcon fuse

    the odds of having 2 main boards with exact same problem is rare but could happen

    could this actually be a bad tcon board? ..maybe is shorted out and not allowing main board to send the 12v?..or is this not a possibility.

    thank you
    Tags: None
    • shelby5041
      Badcaps Legend
      • Feb 2009
      • 1505
      • united states of america usa
      #2
      Re: Samsung LCD TV no picture backlight on no 12v at tcon

      i think issue may actually be tcon...if i remove the tcon cable from the main board i now have the 12v at main board check point....so maybe tcon is shorted out which causes to lose 12v at main board to tcon?

        Comment

        • shelby5041
          Badcaps Legend
          • Feb 2009
          • 1505
          • united states of america usa
          #3
          Re: Samsung LCD TV no picture backlight on no 12v at tcon

          It was faulty tcon causing main board to shut 12v off

          Replaced tcon ..$8...now works great

            Comment

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