HP 4730s some keys on keyboard not working

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  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3558
    • slovakia

    #1

    HP 4730s some keys on keyboard not working

    Hello.
    Have this HP 4730s that some keys on keyboard not working. it was water spilled. cleaned, replaced keybord, but even with new keyboard, some keys are not working, like q w e r . connector looks clean, KBC looks ok.

    how to check it?
  • mosfetratus
    Sure Not
    • Feb 2019
    • 174
    • Resistron

    #2
    Re: HP 4730s some keys on keyboard not working

    I/O controller is damaged? No other suspect for such problem.

    Comment

    • ktmmotocross
      Boardkiller
      • Feb 2014
      • 3558
      • slovakia

      #3
      Re: HP 4730s some keys on keyboard not working

      everything looks ok. pins on kbc looks ok. measured 3.3V on most every resistor connected to connector

      Comment

      • mcplslg123
        Badcaps Legend
        • Jun 2015
        • 7262
        • india

        #4
        Re: HP 4730s some keys on keyboard not working

        did you checked pch area for corrosion?? I had similar problem on a hp 2000 mb and found corrosion near pch was the factor(Replacing kbc didnt worked.

        Comment

        • ktmmotocross
          Boardkiller
          • Feb 2014
          • 3558
          • slovakia

          #5
          Re: HP 4730s some keys on keyboard not working

          yes, no corrosion and whole board was in ultrasonic bath

          Comment

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