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Hi guys this time I have a 820-00163 board with no water damage or corrosion. I checked:
When you connect charger, PM_SLP_S4_L pulses in cycle, or just two times?
If pulses at least once, all S3 voltages should pulse at same time.
Also check for pulse at PM_SLP_S3_L and S0 voltages.
Any pulse at ALL_SYS_PWRGD?