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PM_SLP_S5_L, PM_SLP_S4_L and PM_SLP_S3_L all pulses from 0V to 3.3V when pulsing SMC_ONOFF_L PM_SLP_S0_L however is a little weirder. After connecting charger, I get a pulse from 0V to 3.3V but then it goes down to about 2V (with a lot of ripple, too). Then each time I pulse SMC_ONOFF_L, I see a...

Yup, when I tie SMC_ONOFF_L to ground, I get 0V on PM_PWRBTN_L

Hi, Board won't start in SMC bypass mode. Levels are (with the board out of the machine, no battery plugged in): PM_BATLOW_L 3.33V PM_RSMRST_L 3.26V PM_PWRBTN_L 3.41V SMC_ONOFF_L 3.41V

Hello, So, this is my first attempt at an Apple board repair. I have a defective board taken from an A1502 2013 13' Retina MBP. No sign of liquid damage, no obviously burnt component. Overall board visually looks in very good shape. Board gives a green and then orange light on the charger, but...