Α1466 (820-00165-02) No fanspin,doesnt turn on

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  • kosmo
    Member
    • Sep 2014
    • 34
    • Greece
    #1

    Α1466 (820-00165-02) No fanspin,doesnt turn on

    Hello, this motherboard had a low resistance in L7520 caused of Q7520 i replaced it and its ok now, i also replaced U7501. with io cable installed (J9500) i have only in (L7560 PPDDR_S3_REG_R 3.3V) and i dont have P5VS4RS3_EN , i removed all the coills one by one to see where is the problem and when i lifted (L7430 PDDR_S3_REG_L) and removed (J9500 without io cable installed) i had voltage in (L7520 PP5V_S4RS3 5V) (L7630 P1V05S0_LL 1.0v) and ((L7560 PP5V_S4RS3 3.3V) i checked all power rails and PP1V2_S3 is missing also PP0V6_S0_DDRVTT is missing.all other is ok,i checked for short and all looks ok. also with removed coil in L7430 the one side PDDR_S3_REG_L gives 2v and PPDDR_S3_REG_R 0v i replaced U7400 and still the same.i also noticed that after long time it warms up in the spot i marked in the photo i uploaded.any ideas? :/
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    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: Α1466 (820-00165-02) No fanspin,doesnt turn on

      This is pretty confusing. Don't remove random components without reason.
      Voltage on PM_BATLOW_L with and without FFC DC-in cable?
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • kosmo
          Member
          • Sep 2014
          • 34
          • Greece
          #3
          Re: Α1466 (820-00165-02) No fanspin,doesnt turn on

          Originally posted by piernov
          This is pretty confusing. Don't remove random components without reason.
          Voltage on PM_BATLOW_L with and without FFC DC-in cable?
          hello thx for response.without ffc cable 3.32v with ffc cable 0.03v

            Comment

            • piernov
              Super Moderator
              • Jan 2016
              • 4435
              • France
              #4
              Re: Α1466 (820-00165-02) No fanspin,doesnt turn on

              Use a genuine Apple Magsafe2.
              OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                Comment

                • kosmo
                  Member
                  • Sep 2014
                  • 34
                  • Greece
                  #5
                  Re: Α1466 (820-00165-02) No fanspin,doesnt turn on

                  Originally posted by piernov
                  Use a genuine Apple Magsafe2.
                  all test is with genuine charger.

                    Comment

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