Hi, thanks for your answer.What I would do is put only a patched bootcode.bin in the root of a FAT formatted partition. Patched so it by default outputs serial console debug info. See RPi docs how to. Also connect an ethernet cable and look if BOOTP/DHCP is issued, can be done with wireshark or logging dhcp in dnsmasq (I have netboot enabled for RPi).
I cannot really comment on voltages, my Pi2 randomly resets after a while, I am almost sure I electrically overloaded the default 1-wire GPIO pin long time ago. Have not tried since a year or so how dead it really is, but got similar issues as you with a Pi3B. Very strange behavior w.r.t. SD-cards, so with only bootcode.bin, there is minimal read, no write and like a Pi4 behavior on the network.
I don't understand this process.
Statistics: Posted by filippos — Sun May 04, 2025 6:22 pm