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820-3437 not turning on

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  • 820-3437 not turning on

    Have a 820-3437 with no liqud or drop damage. All main power rails are present up to PP3V3_S0 but still wont turn on. U8180 has all rails present as well.


    PPBUS_G3H = 8.6V
    PP3V42_G3h = 3.41V
    PPV5_S5 = 5V
    PP3v3 = 3.3V
    PP3V3_S3 = 3.3V
    PM_SLP_S4_L = 3.3V

    what to check next?

  • #2
    PP5v_S0 present? Is PP3v3_S0 shorted?

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    • #3
      PP5V_S0 is not present and no its not shorted to ground

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      • #4
        Ok so something else is missing. Post voltage for PP5v_S4RS3 and all of your S3 Rails.

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        • #5
          "All main power rails are present up to PP3V3_S0"
          Do you mean 3V3_S0 is present?

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