Macbook A1989 - no power

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  • tommy97
    Senior Member
    • Mar 2023
    • 151
    • United Kingdom
    #1

    Macbook A1989 - no power

    Hi,

    i've got A1989 after liquid damage, had 2 CD3215 burned (Including primary), i've removed 2nd one and replaced primary with new one - same thing.

    PPBUS 12.25v

    PP3V3_G3H_RTC 3.3V
    PP3V3_UPC_XA_LDO 3.3 V
    PP1V8_UPC_XA 1.8
    PP1V8_SLP 1.8V

    5V 0.200amp on the amp meter - device is not in DFU
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14170
      • Canada
      #2
      Test the LDO voltage of each CD3215.

      https://logi.wiki/index.php/CD3215_Bootup_Sequence

        Comment

        • letsolutions
          New Member
          • Jul 2021
          • 1
          • india
          #3
          ppbus_g3h = 12.25, is it enough?

            Comment

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