Bootloader EEPROM on a Raspberry Pi 5: upgrade a locked Pi, what you need

You have a Raspberry Pi 5 whose check says NOT DONE, and want to give it the fleet’s bootloader and lock it again, with the Pi in your hands. (How far each step has been tried by us is listed under What has been run.)

The six steps, one page each, in this order:

• Step 1: make the card

• Step 2: network cable out

• Step 3: join the two FLASH WP pads

• Step 4: card in, network cable in, wait for the green light

• Step 5: cable out, card out, bridge off, cable in

• Step 6: read it back