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Weird Samsung LN46A550 problem....

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    Weird Samsung LN46A550 problem....

    So I picked up a cheap Samsung the other day, and lo and behold there was a good reason it was cheap.....so I started trouble shooting. I have not come across another instance like this so I thought I'd post and see what the general consensus was before I started throwing parts at the thing.
    The inverter seems okay, with the TCON disconnected I get backlights just fine. If I connect the TCON, I get dark splotches on the left side which immediately fade, and then the entire screen fades to gray/white (with the left side of the screen always tending toward white). If I connect a source (HDMI or component) I can see a very low contrast version of it. Here's the trippy part - the entire image on the right side of the screen is inverted color.
    Sound works fine, tv is not power cycling, and I scrounged a tcon from another tv and cannot tell the difference in result (same gray screen etc) when switching between the two....I have fiddled with the bonding tabs and cannot see any difference on the screen.

    Any Ideas??
    I do not currently have a camera, so no photos I'm afraid.

    Thanks in advance - Wes

    #2
    Re: Weird Samsung LN46A550 problem....

    Finally got a photo - sorry for the delay - it was a bit of a process....
    Attached Files

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      #3
      Re: Weird Samsung LN46A550 problem....

      Possible you have 2 bad t-cons, photos of the boards would be helpful.

      Also looks like it could be a bad panel as well.

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        #4
        Re: Weird Samsung LN46A550 problem....

        I will take some pictures and post them when I get home from work - would both TCONS do the exact same thing though?

        Is there any way to actually test the boards as opposed to just replacing them? I am handy with a meter and soldering iron - though my o-scope is out of commission...

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          #5
          Re: Weird Samsung LN46A550 problem....

          http://www.shopjimmy.com/catalogsear...msung+LN46A550

          Which one is your T-CON board? AUOPTO?
          Last edited by budm; 10-24-2014, 03:20 PM.
          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

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