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I connected the master USBc port to a mac and apple configurator didn't see it. Voltage at C5403:1 is 12.32V - even though that component doesn't seem to be present.
Use the external switch method, if you cannot acces DFU with its keyboard.
You may need to disconnect touch ID and use another switch for PMU_ONOFF_L pads.
I'm unfamiliar with the external switch method. I don't understand the instructions, because the device will not power on, how will I put it in DFU mode?
I hear you, I didn't have a schematic, only a BV. But anyway, I understand your instructions, but just want to clarify one thing. To do what you're talking about, I will need to remove the board, join RV005, then reinstall the board - this is correct? I didn't see a way to get to RV005 from the top of the board, but you are far more experienced, and the techs over there are super fast, so I want to make sure I'm not making more work than necessary.
I don't have such board on my hands.
Find a convenient point for 1V25_S2; to avoid board removal.
Connect the switch between such point and SV004; pad 2, or 4.
Thank you for the extremely clear instructions. I have done as suggested but nothing happens, nothing comes up in Apple Configurator. For reference, I'm using RD211:1 for 1V25_S2, at which point, there is no voltage.