hp elitebook 840 g3 wont turn on...board number 6050a2892401-mb-a01

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  • dqtech
    Badcaps
    • Jul 2018
    • 630
    • N/A

    #1

    hp elitebook 840 g3 wont turn on...board number 6050a2892401-mb-a01

    ampere stuck on 0.03a ....press power button get no response...i already try flash bios main+ec but problem still persist...i have no schematic@boardview for this board...19v/5v/3.3v rail all normal...laptop charging also okay
    Attached Files
    Last edited by dqtech; 12-29-2024, 06:10 AM.
  • gou96
    New Member
    • Dec 2024
    • 1
    • Greece

    #2
    So 0.03A is without a battery since the laptop is charging ok?
    Did you test the power button?

    Comment

    • dqtech
      Badcaps
      • Jul 2018
      • 630
      • N/A

      #3
      Originally posted by gou96
      So 0.03A is without a battery since the laptop is charging ok?
      Did you test the power button?
      yes without battery stuck on 0.03a....with battery read 0.15a...power button okay....without cmos battery also wont turn on

      Comment

      • mcplslg123
        Badcaps Legend
        • Jun 2015
        • 7262
        • india

        #4
        Since 19V/5V/3.3V is present, look for RSMRST# is present on kbc(may be after power button).
        You can just gran another schematic with same SIO and check its basic requirements.
        Do check the motherboard under microscope/magnifier for any obvios signs.

        Comment

        • dqtech
          Badcaps
          • Jul 2018
          • 630
          • N/A

          #5
          Originally posted by mcplslg123
          Since 19V/5V/3.3V is present, look for RSMRST# is present on kbc(may be after power button).
          You can just gran another schematic with same SIO and check its basic requirements.
          Do check the motherboard under microscope/magnifier for any obvios signs.
          kbc on this board nuvoton npce586ha0mx ....i found similar kbc on board quanta dax63cmb6c0 rev:c

          RSMRST# pin 85 = 3.3v sir
          Attached Files

          Comment

          • mcplslg123
            Badcaps Legend
            • Jun 2015
            • 7262
            • india

            #6
            Check Crystal for 32.68Hz clock.

            Comment

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