UPDATE: LN-T5271F FIXED backight on sound ok, no picture

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  • ilikesteel
    Badcaps Veteran
    • Jul 2012
    • 284
    • usa
    #1

    UPDATE: LN-T5271F FIXED backight on sound ok, no picture

    Replacing the T-CONN board fixed my problem. the symptoms were a very intermittent BACKLIGHT ok, SOUND ok, NO picture. after troublshooting and with advice by budm, tom66 and a number of other fourmites it's fixed.

    I was down to either the main board or T-conn board. more researching revealed about 85% of the time with those symptoms, the T-conn was the culprit. I bought a T-conn on ebay for $32. power cycled it about six times and each time the picture came right up. before, 98% of the time the picture would not come on.

    now I have the bad t-conn. is it worth troubleshooting while I have the set apart on the bench. I'd be willing to try if I had some things to check. I don't have a scope for signal tracing.

    old t-conn had a good fuse and 12V on each side of the fuse.

    thanks again for all the advice and guidance.

    ilikesteel
    Tags: None
    • ilikesteel
      Badcaps Veteran
      • Jul 2012
      • 284
      • usa
      #2
      Re: UPDATE: LN-T5271F FIXED backight on sound ok, no picture

      "bump"

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        • ilikesteel
          Badcaps Veteran
          • Jul 2012
          • 284
          • usa
          #3
          Re: UPDATE: LN-T5271F FIXED backight on sound ok, no picture

          added some pictures of the set and T-conn board. the T-conn has 12V going to the board and on both sides of the fuse. cannot find a schematic for this set. any voltage points to check beyond the fuse?

          thanks
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