The topic was not helpful.
I've fried all of my expansion docks. When replacements arrive I'll use one and uart receive to listen to tx0 on the broken device to see how far it boots.
If that experiment yields sensible results I'll post to help out the next person with this issue.
Hi, i have similar problem
But my booting is runs about 23-24 seconds before stops
I can get boot log from UART, powerup without UART connect, and after yellow led turns on - connect UART, so few first lines were corrupted.
this is bootlog
Also i try to check power - all is ok - i powered by AMS1117-3.3 with 200uF capacitor
Maybe someone have problem resolve?