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20v without battery
PPBUS 13v is present
3v3_g3h is present
All voltages around cd is present It will show this error and flash apple logo and goes back to dfu.
I’ll check for ssd voltages
Faults. Yes
The macbook came in with 5v, I changed one resistor around u7000 and 20v came. The Macbook trackpad is clicking but no apple logo, black screen.
I now try to restore it with configurator 2.
then this error 9 came.It’s permanently on dfu now.
Trackpad click is not a sign of life.
Once actuator is powered, you will sense the force feedback.
But is just a hardaware response, no need the board to boot.
Check if board voltages are steady, or restarts at the moment when trackpad click is not present.
Do you have 3 identical boards, with exact the same symptoms?
Around the usb c controller ic u3200
Pp3v3_upc_xb_ldo is steady
Pp3v3_g3h_rtc_x is steady
Ppbus_g3h is steady
Pp1v8_slps2r is steady
5v is missing though
Voltages are steady. The once I have checked so far.
yes 3 different board drawing 20v no life.
I hope this "How to" collection will help our members. I will possibly modify this post in time, if updates available. Trigger SMC_ONOFF_L (PMU_ONOFF_L): It reffers to simulate power button function, when the keyboard is not connected. We need to do this when we work with the board...