DELL 3521 La-9104P problem

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  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india
    #1

    DELL 3521 La-9104P problem

    Model : Dell Inspiron 3521
    Motherboard : La-9104p Rev 1.0

    Problem: Laptop boots fine with battery. In off condition ,if you plug in charger,Charging indicator is on and it does charge battery. Now, When the laptop is switched only on ac power, It doesnt boots, fan spins continiously and there is no vcc core. But if i switch on battery only,display comes fine and if i connect adapter now(While the laptop is on with display with battery power only), there is slight blink on the screen and display goes off but backlight remains on.

    Where should i look for??

    Ps: It uses Bq24747 as charging ic and not ISL
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: DELL 3521 La-9104P problem

      I'm using Dell 90W Original adapter(100% tested ok) and my battery is also tested fine. Tried with a dell 65w Adapter also.

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india
          #3
          Re: DELL 3521 La-9104P problem

          Problem resolved

            Comment

            • ivmilicevic
              Member
              • Aug 2017
              • 14
              • Bosnia and Herzegovina
              #4
              Re: DELL 3521 La-9104P problem

              How did you resolve problem? It's useful lo leave explanation, so that next person that searches for this knows what to look for

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india
                  #5
                  Re: DELL 3521 La-9104P problem

                  Originally posted by ivmilicevic
                  How did you resolve problem? It's useful lo leave explanation, so that next person that searches for this knows what to look for
                  here is how:

                  +1.05v Line gets shorted when ac adapter plugged in-no vcc + coils near pch drops to 0v. On further probing ,found Pu500(Tps51212) is faulty.
                  Replaced with Richtek alternative with marking 88. Problem solved.

                  We'all are sharing knowledge with each other, so i dont have any issues sharing

                    Comment

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