Zephyrus G14 no power/charging diagnostic

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  • bogosort
    Senior Member
    • May 2022
    • 78
    • Canada
    #1

    Zephyrus G14 no power/charging diagnostic

    Hello,

    I am trying to diagnose this GA401IV laptop and found that the VOUT (pin 3) on the PU8301 step-down converter has a short to ground. Pin 1 on PCO8301 as well (has continuity to ground). Is the PL8301 coil faulty or is it the PU8301 that is bad?




    Thank you
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    • Stevedb
      Stevedb
      • Feb 2018
      • 624
      • Belgium
      #2
      Re: Zephyrus G14 no power/charging diagnostic

      Hi inductor will almost never fail so it is the mosfet or capacitor

      When the highside mosfet fail better replace lowside and the driver ic too if it is dr mosfet just that.

      Hopefully it is just the mosfet and is cpu or gpu good.

      Good luck

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