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Any S3 voltage present?
Do you get at least a pulse on S3 and S0 coils?
Check that triggering SMC_ONOFF_L signal.
ALL_SYS_PWRGD requires PM_SLP_S3_L presence.
First be sure to have 3V at pin 1 of R7967.
If yes, remove Q7950 and test again ALL_SYS_PWRGD.
If still low, remove R7963-66, one by one, until signal goes high; don't forget R7901 too.