NEC LCD1700v ... feeling clueless

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  • retiredcaps
    Badcaps Legend
    • Apr 2010
    • 9271

    #21
    Re: NEC LCD1700v ... feeling clueless

    Sorry, forgot to mention that the DMM I'm using right now doesn't have a capacitance test function.
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    • Dgtech
      E. Technician
      • Apr 2009
      • 1462
      • Steeler

      #22
      Re: NEC LCD1700v ... feeling clueless

      Two 100uF caps in parallel would make 200uF, just for test.
      The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

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      • Dgtech
        E. Technician
        • Apr 2009
        • 1462
        • Steeler

        #23
        Re: NEC LCD1700v ... feeling clueless

        I forgot what thread it was but someone had even switched the top ccfl's with the bottom ones and had some temporary stability in which was a clue into what was going bad.
        The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

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        • retiredcaps
          Badcaps Legend
          • Apr 2010
          • 9271

          #24
          Re: NEC LCD1700v ... feeling clueless

          Well I got a Benq FP731 today and when I opened up the case, I noticed that the connectors to the CCFLs are the same as the NEC 1700V so I immediately connected the NEC inverter to the Benq screen and Benq screen lit up and stayed lit (showed a bright white screen).

          Obviously, I had no VGA display since the control logic/data cable are all different, but the CCFLs stayed lit.

          So this tells me that something is wrong with the NEC CCFLs. So the next step will be to dismantle that and checked for arcing, burnt solder, etc.

          PS. I still had the way over 470uF caps in there for the test. I fully intend to switch it out for the proper capacitance.

          Originally posted by Dgtech
          I forgot what thread it was but someone had even switched the top ccfl's with the bottom ones and had some temporary stability in which was a clue into what was going bad.
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