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To reset SMC and NVRAM you need a keyboard, but as I wrote earlier, the touchpad clicks but the caps lock does not light up green when pressed, which means the keyboard does not work.it's just stuck at 20v and 0.200-0.218a
I removed the cable on the J8500 connector and found a burnout between PP5V_S0_ALSCAM_F and GND, possibly due to water damage. Maybe this will help determine the malfunction (no short circuit was found)!