Boron stuck in rapid cyan blink

[friedl_1977]

Hi @MikeG -

I don't have much experience with Boron but if what I read in this thread:

Boron Claiming device without SIM Card

What ScruffR said about the SIM is true. It’s soldered on the board on the Boron. And, no, you can’t claim any Particle device unless it has cloud access. There’s a cryptographic handshake that’s required over the air, and it can’t be done offline. You can use a Boron connected by USB only mode, programming by USB and running it with cellular disabled, SYSTEM_MODE(MANUAL), however.

is indeed correct, it seems you will have to submit a support ticket. I suppose you have tried particle flash --serial tinker via CLI as it seems to solve many problems

Regards,
F.