HP W2338H flickering and buzzing

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  • GoneGault
    Senior Member
    • Sep 2013
    • 105
    • United States

    #1

    HP W2338H flickering and buzzing

    I picked this monitor up hoping to repair it; when it comes on, it has a buzzing sound that gradually goes a way. The image looks good at first, then the lower half of the image gets darker and starts flickering. I have run it for some time now, and the monitor has not gone dark, and the image is still bright enough to read. I haven't opened it yet, and hoped to get a prelim 'scouting report' from the members here.
    Attached Files
  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #2
    Re: HP W2338H flickering and buzzing

    Cant tell anything from that picture certainly looks better than the crap laptop im working on.
    Dimming and flickering and buzzing tends to be Bulbs/ associated wiring or
    inverter transformers.
    You need to take it apart and find out what is buzzing - does a noise accompany the flickering - have you any spare bulbs.another panel?
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #3
      Re: HP W2338H flickering and buzzing

      Do you have AM transistor radio? If you do, tune it to the blank station on the dial, then put it close to the panel, apply the power and turn on the monitor, listen for the static on the radio to see if it in sync with flickering on the screen, if it does, then you more likely to have arcing going on in the panel due to bad wiring on the lamp's ends.
      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

      • GoneGault
        Senior Member
        • Sep 2013
        • 105
        • United States

        #4
        Re: HP W2338H flickering and buzzing

        When tore the monitor down I found arching from a broken tube. I have never replace any tubes; what length should I buy?
        Attached Files

        Comment

        • selldoor
          Slow Learner
          • Dec 2010
          • 7870

          #5
          Re: HP W2338H flickering and buzzing

          You measure them length and diameter useful info here - they also have an ebay site sometimes with bargain reductions

          http://www.ccflwarehouse.com/
          Please upload pictures using attachment function when ask for help on the repair
          http://www.badcaps.net/forum/showthread.php?t=39740

          Comment

          • GoneGault
            Senior Member
            • Sep 2013
            • 105
            • United States

            #6
            Re: HP W2338H flickering and buzzing

            Bummer...I broke the LCD panel...Oh, well...now I have parts to sell!
            Attached Files

            Comment

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