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HP f1903 problem.

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    #1

    HP f1903 problem.

    This monitor keeps eating C5907s on one side of the inverter. I've replaced the caps on the inverter and resoldered the plugs. There was a bulged cap on the video board but another tech lost it. I replaced it with 1000uf at 25v but I think its too big. Anyone know what the cap should be on the video board or why else one side of ICs would burn.
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    #2
    Re: HP f1903 problem.

    Originally posted by NxB
    This monitor keeps eating C5907s on one side of the inverter. I've replaced the caps on the inverter and resoldered the plugs. There was a bulged cap on the video board but another tech lost it. I replaced it with 1000uf at 25v but I think its too big. Anyone know what the cap should be on the video board or why else one side of ICs would burn.
    The most likely cause would be a short. It could be as elusive as a shorted turn on the transformer, or a shorted (or open) cap or transistor.

    PlainBill
    For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

    Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

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      #3
      Re: HP f1903 problem.

      I dug through it more, it seems like a short. I think it not worth messing with anymore. I think the transformer is shorted on that side.

      Comment

        #4
        Re: HP f1903 problem.

        Originally posted by NxB
        I dug through it more, it seems like a short. I think it not worth messing with anymore. I think the transformer is shorted on that side.
        Exchange the transformers with each other just to make sure.
        There are 10 kind of people in this world: those that understand binary, and those who don't.
        • ASUS ROG Maximus IX Code
        • Intel Core i5-7600K 3.8GHz
        • 16gb GSKILL TridentZ RGB DDR4-3200
        • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
        • Windows 10 Pro x64
        • GeForce GT1050
          2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

        Comment

          #5
          Re: HP f1903 problem.

          Originally posted by eguevarae
          Exchange the transformers with each other just to make sure.
          And if it IS a bad transformer, check to see if someone here has one available.

          PlainBill
          For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

          Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

          Comment

            #6
            Re: HP f1903 problem.

            I don't want to lose more C5907s. One of them was arcing. I got this thing on a couple of times and I thought I fixed it. I put it in the case and it stopped turning on. I think when you put the screen in the metal housing it shorts or moves something. Either way I've done WAAAY too much work for $50.

            Comment

              #7
              Re: HP f1903 problem.

              Originally posted by NxB
              Either way I've done WAAAY too much work for $50.
              That changes the approach. Save it for parts, for future use of the lamps, screen or something else.
              There are 10 kind of people in this world: those that understand binary, and those who don't.
              • ASUS ROG Maximus IX Code
              • Intel Core i5-7600K 3.8GHz
              • 16gb GSKILL TridentZ RGB DDR4-3200
              • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
              • Windows 10 Pro x64
              • GeForce GT1050
                2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

              Comment

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