Quanta G34A Big Trouble

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  • sonunigam
    Senior Member
    • Aug 2013
    • 151
    • Pakistan
    #1

    Quanta G34A Big Trouble

    Hey Guys,
    I'm facing a very mysterious Problem, I've got a Motherboard Quanta G34A Which cannot be turned on with charger but it can be turned on with battery. when i connect a faulty but Original battery Laptop Turned on with charger. I've checked all Charging IC PU1 (ISL88750) Voltages, Everything is perfect but when i checked 3/5V Coils there is no voltages. I've checked VIN voltages on PU2 (SY8208B) for 3V IC that is only 8,7 VOlts. So i think VIN is not generating properly. I think VIN should be 19V. Anybody can give me any idea what should i do? I'm uploading Schematic Diagram n BoardView. Please Guys help me out.
    Thnx.
    1 Thing more on CLR (PR2) there're Proper 19V Generating. Which Means PQ1 and PQ2 Working well. ON PQ1 n PQ2 Gate Voltages 25Volts.

    MOD EDIT: Link to schematic -> https://www.badcaps.net/forum/showthread.php?t=66810
    Reminder: rules and organization of this section -> https://www.badcaps.net/forum/showthread.php?t=117483
    .
    Last edited by SMDFlea; 06-21-2023, 08:51 AM.
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: Quanta G34A Big Trouble

      NVDC technology is used and hence 8.8V as VIN may be absolutely fine.If its not turning on with charger only,check AD_ID.

        Comment

        • sonunigam
          Senior Member
          • Aug 2013
          • 151
          • Pakistan
          #3
          Re: Quanta G34A Big Trouble

          Hey mcplslg123,
          Thanks for your reply, But as i written in this thread that Laptop is turning on with battery but not with charger. Can you suggest anything? When i plug in the charger the charging light Glowing but Laptop is not turning on. When i checked 3v/5v Supplies. Those're not present there.

            Comment

            • mcplslg123
              Badcaps Legend
              • Jun 2015
              • 7262
              • india
              #4
              Re: Quanta G34A Big Trouble

              You need to re-read my post#2 and act on that suggestion. I've read your post#1 and accordingly i do know it works on battery but dont on charger.

                Comment

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