HP X20LED 20" LED not working

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #21
    Re: HP X20LED 20" LED not working

    The yellow and the green wires on the LED driver board, those two wires I am not 100% sure as to which one is for BL_ON and which one is for DIMMING, but one of them does go up to >3V when monitor is ON. Right now I need that DCV on the 00V cap by the LED connector to see if the booster is working or not.
    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

    • selldoor
      Slow Learner
      • Dec 2010
      • 7870

      #22
      Re: HP X20LED 20" LED not working

      Originally posted by lti
      The missing cap could also be the problem. The part number on U801 on the LED driver might help.
      Hmm The missing cap is on the main board - had me looking for it for while.
      Have you still got your pictures if so perhaps an indication of the size by comparing it to others on the board? Is it the same size as c721 or c715
      C712 doesnt even look like a cap - it is black???? Burnt??
      Please upload pictures using attachment function when ask for help on the repair
      http://www.badcaps.net/forum/showthread.php?t=39740

      Comment

      • lti
        Badcaps Legend
        • May 2011
        • 2545
        • United States

        #23
        Re: HP X20LED 20" LED not working

        It looks like it's the same size as C721 and C712. I didn't take a picture of the back of the main board.

        Comment

        • angel-boy
          Badcaps Veteran
          • Jan 2013
          • 550
          • Romania

          #24
          Re: HP X20LED 20" LED not working

          The monitor is working again, i replace the C713 and U101 and all good,

          Thank you all for your help !!!

          Comment

          • selldoor
            Slow Learner
            • Dec 2010
            • 7870

            #25
            Re: HP X20LED 20" LED not working

            That is great news - where did you get a U101 atmlh 010-02b
            Please upload pictures using attachment function when ask for help on the repair
            http://www.badcaps.net/forum/showthread.php?t=39740

            Comment

            • angel-boy
              Badcaps Veteran
              • Jan 2013
              • 550
              • Romania

              #26
              Re: HP X20LED 20" LED not working

              i find on sale a broken board second-hand in my town and i bought fast !

              I'm glad it works again !

              Comment

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