Asus-vivobook-s15 no cpu vcore

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  • Francisco.s
    Badcaps Veteran
    • Jan 2013
    • 685
    • Spain
    #1

    Asus-vivobook-s15 no cpu vcore

    Hi, this Asus have all main voltages but no +VCCCORE.

    Motherboard is a X530UN rev 2.0. (seems that there are no boardview for this model)
    The chip that controls pwm signals for cpu is a qfn-52 ATK1604ACGQW.

    I don't know if there is an equivalent for this controller so I will appreciate any comment about it.

    Near the cpu are three .24 uH coils that have no short to gnd. (two of them have a resistance of 7.1 ohms, and the other one 4.2 ohms)

    IT8995 has a high level at pin 68. (this pin used to be ALL_SYSTEM_PWRGD in other asus motherboards, and controls the enable pin for the cpu power)

    I have tested other bios dumps and reprogram IT8995, but didn't solve.

    It drains 490 mA. from power supply.

    Can someone point me what to do in order to solve it?

    thanks.
    Tags: None
    • juntmeako
      NOOB
      • Jul 2020
      • 67
      • na
      #2
      Re: Asus-vivobook-s15 no cpu vcore

      check the mosfets at cpu... also, 490ma is a lot when laptop is off

        Comment

        • Francisco.s
          Badcaps Veteran
          • Jan 2013
          • 685
          • Spain
          #3
          Re: Asus-vivobook-s15 no cpu vcore

          Originally posted by juntmeako
          check the mosfets at cpu... also, 490ma is a lot when laptop is off
          Mosfets from cpu vcore are good, and never have pulses in its gates.

          When keep power button down for a few seconds, it enters into stand-by, but in less than a second, powers-up again.

          Removing coils from +vgacore the power consumption doesn't change, but removing the coil from +1.0VSUS, the 490 mA. goes down to 30 mA. (also the pch zone from cpu gets very hot with all coils in place)

          I think it needs a new cpu.

            Comment

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