I've tried to restore the firmware of my boron based on this link:
However the board doesn't seem to work still. So I'm wondering how to do a full firmware reset for the boron.
Hey @enoryt56
You can check out my suggestions here. You can use an NRF52DK to unbork your Boron.
Good luck! 
You can also use the Particle Debugger to restore if you have one
https://docs.particle.io/support/particle-tools-faq/jtag/#openocd-commands-3rd-generation-
Thank you very much 
I actually found another one of your other links being very useful as I manually used the commander method:
https://www.jaredwolff.com/how-to-unbrick-particle-mesh-using-jlink/#!
Awesome. Glad you found it useful. 