The other thing to check is that the 'boot flag' is set on your USB drive/stick.
https://www.raspberrypi.com/documentatio...boot-modes
The above document says earlier that boot from USB 2 is supported. Are you using a USB 3 device ? Have you tried with a USB 2 device ?
I recall I had a similar problem with a 3B and tried several USB sticks until I found one that worked.
https://www.raspberrypi.com/documentatio...boot-modes
The above document says earlier that boot from USB 2 is supported. Are you using a USB 3 device ? Have you tried with a USB 2 device ?
I recall I had a similar problem with a 3B and tried several USB sticks until I found one that worked.
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bob
bob
