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iMac 21.5" Mid Late 2015 820-00430-A no clue

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  • #31
    PM_EN_S0 is 3.3v at U8600 but
    PM_EN_FET_P3V3_S0_R at U8600 is 0.013v

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    • #32
      Yeas, because missing PM_PGOOD_REG_P1V05_S0 signal; which is same as REG_P1V05S0_PGOOD.
      PM_EN_S0 presence suppose to get some S0 voltages controlled by this signal.
      Check PM_EN_FET_P3V3_S0, PM_EN_FET_P12V_S0 and PM_EN_FET_P5V_S0

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