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SMC_PM_G2_EN is not stable. This sucks as this could be an SMC issue or it could be that S5_PWRGD goes low. It could be that 3v3_s3 or s0 is shorted. Check for short to GND on R8000,8011,8050,8020. Also check for shorts on all 5V busses, S3 and S0.