Ue49m5500 no picture but backlights

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  • sordids999
    Badcaps Legend
    • May 2013
    • 2149
    • uk

    #1

    Ue49m5500 no picture but backlights

    Hi guys

    Got this samsung today but no picture
    on the screen but backlights are good

    Tcon fuse has 12v

    Pin 1 Nc 3.26v
    Pin3 13v 12.7v
    Pin5 13v 12.7v
    Pin7 13v 12.7v
    Pin9 13v 12.7v
    Pin 11 and
    Pin 2 of on/off 3.3v
    Pin4 od/us 3.26v
    Pin7 blu_pwm 3.26v
    Pin8 ps_on 3.26v
    Pin 10 gnd
    Pin 12 gnd

    Thanks
    Attached Files
  • sordids999
    Badcaps Legend
    • May 2013
    • 2149
    • uk

    #2
    Re: Ue49m5500 no picture but backlights

    If I disconnect the left side tcon ribbon I have a white screen
    If I disconnect the right side ribbon I have a blue screen

    Comment

    • CapLeaker
      Leaking Member
      • Dec 2014
      • 8061
      • Canada

      #3
      Re: Ue49m5500 no picture but backlights

      You shouldn’t see a blue screen. You can check the LVDS pairs with an oscilloscope, while flicking the menu on and off with the remote. Kinda crude way of testing if the main board works. Other than that, jam a new tcon in, they are usually cheap enough.

      Comment

      • sordids999
        Badcaps Legend
        • May 2013
        • 2149
        • uk

        #4
        Re: Ue49m5500 no picture but backlights

        I spoke to the guy his wife used window lean spray to clean the screen then the tv just went off but still with sound and a glow on the screen
        Would this damage the tcon ?
        I'm thinking more cof strips but cant see any damage

        Comment

        • sordids999
          Badcaps Legend
          • May 2013
          • 2149
          • uk

          #5
          Re: Ue49m5500 no picture but backlights

          Both lvds ribbons connected no voltages on the following pins in the picture
          With the left ribbon disconnected voltages are good of the tcon
          Attached Files

          Comment

          • diif
            Badcaps Legend
            • Feb 2014
            • 6978
            • England

            #6
            Re: Ue49m5500 no picture but backlights

            Originally posted by sordids999
            Both lvds ribbons connected no voltages on the following pins in the picture
            With the left ribbon disconnected voltages are good of the tcon
            If you can't see any liquid damage where the film meets the screen then you might get lucky and find it's a shorted capacitor.

            Comment

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