Help needed: MacBook Air A1370 (820-3024)

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  • Joztu
    Member
    • May 2022
    • 46
    • Nigeria
    #1

    Help needed: MacBook Air A1370 (820-3024)

    Hello, please I need help with a 11” Macbook Air A1370 820-3024 that doesn’t come on at all, has orange light on the charger

    The fans spins and stops continuously with no sign of life

    connected it to a power supply and noticed the power keeps fluctuating, draws ~ .500A and then goes down to about 0.074A

    Pp3v43 is 3.3v

    Don’t really know how else to proceed to solve the issue
    Last edited by Joztu; 04-18-2023, 10:31 AM.
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14244
      • Canada
      #2
      Re: Help needed: MacBook Air A1370 (820-3024)

      See attached.

      1) be sure your power adapter is the original.

      2) attach the power adapter.

      3) measure the voltage to ground of each point of interest. Is each voltage stable?

      Post your measurements.
      Attached Files

        Comment

        • Joztu
          Member
          • May 2022
          • 46
          • Nigeria
          #3
          Re: Help needed: MacBook Air A1370 (820-3024)

          Originally posted by mon2
          See attached.

          1) be sure your power adapter is the original.

          2) attach the power adapter.

          3) measure the voltage to ground of each point of interest. Is each voltage stable?

          Post your measurements.

          1: 8.39v
          2: 19.20v when the fan spins, 18.8v when the fans stops spinning
          3: 18.9v with fan spin, 18.6v when fan stops

          Thanks for your reply

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14244
              • Canada
              #4
              Re: Help needed: MacBook Air A1370 (820-3024)

              Review the voltage to ground of PP3V42_G3H_REG @ L6995, pin # 2.

              This rail should be 3v42.

              If it is not, remove all power / no battery -> meter in resistance mode.

              Measure the resistance to ground of this same test point @ L6995, pin # 2.

              What are the measurements?

                Comment

                • Joztu
                  Member
                  • May 2022
                  • 46
                  • Nigeria
                  #5
                  Re: Help needed: MacBook Air A1370 (820-3024)

                  Originally posted by mon2
                  Review the voltage to ground of PP3V42_G3H_REG @ L6995, pin # 2.

                  This rail should be 3v42.

                  If it is not, remove all power / no battery -> meter in resistance mode.

                  Measure the resistance to ground of this same test point @ L6995, pin # 2.

                  What are the measurements?


                  L6995 pin #2 : 3.38v
                  Resistance to ground 316k

                    Comment

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