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Hi I have an 820-2523 with these rails working
PPBUS_G3H =12.61
PP3V42_G3H =3.4
PP5V_S3 =5.v
PP3V3_S5 =3v
am missing my so rails they read 0.0v except for L7770 I get 1.06v with greenlight at MagSafe original one please advise maybe something a,m missing thanks.
PP5V_S5 is pretty much mislabeled in the diagram as it comes from 5V_S3. You say in your first post: PP5V_S3 =5.v, if that is true the power sequence is starting or is this a wrong measurement?
So just to be 100% sure here, there is 5V present on L7220? If that is the case the board is starting the power cycle and more S3 rails should be present. Also PM_SLP_S4_L should be present.