Hp 470 G2 not turn on

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  • arber1232
    Badcaps Veteran
    • Dec 2019
    • 367
    • Albania

    #1

    Hp 470 G2 not turn on

    Hi everyone
    I have hp 470 g2 not turn on zpl40/50/70
    when i put charcher dc jack flashing orange light for 2 second and off
    i check voltage i have 19.5 v and ADP_SIGNAL is 3,3v
    i check first mosfet for shorts is ok
    In bios i have 3.4v in pin 6 and 7
    Can i help me ?
  • mon2
    Badcaps Legend
    • Dec 2019
    • 13887
    • Canada

    #2
    Re: Hp 470 G2 not turn on

    Measure the voltage to ground of each pin of the 2*DCin mosfets.

    Interested in the

    Source (1-2-3)
    Gate (4)
    Drain (5-6-7-8)

    Pin voltage measurements. Repeat for the 2nd DCin mosfet. Post all measurements.

    Comment

    • arber1232
      Badcaps Veteran
      • Dec 2019
      • 367
      • Albania

      #3
      Re: Hp 470 G2 not turn on

      Pq101
      source=19,5v
      gate=6.1v
      drain=19.5v
      pq102
      source=19.5
      gate=25v
      drain=19.5v

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 13887
        • Canada

        #4
        Re: Hp 470 G2 not turn on

        Post pics or topside markings of these measured mosfets.

        Wish to confirm if one is a P-channel and the other is a N-channel type.

        Comment

        • arber1232
          Badcaps Veteran
          • Dec 2019
          • 367
          • Albania

          #5
          Re: Hp 470 G2 not turn on



          do you need schematic ?
          Attached Files
          Last edited by Vesko356; 07-05-2023, 02:43 AM. Reason: Posts merged.

          Comment

          • Vesko356
            VIP Moderator
            • Aug 2018
            • 4386
            • Bulgaria 🇧🇬

            #6
            Re: Hp 470 G2 not turn on

            Originally posted by arber1232
            ...
            Schematic ---> https://www.badcaps.net/forum/showth...633#post678633

            .
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