System failed to boot

Well, @vance.lee, there are many who have gone before you. What you describe is a – perhaps “the” – principal failure mode of the B305 and several of its cousins. Perhaps you may find some counsel among the links which follow.

While I fully appreciate the urgency of an event such as you describe, I’m thinking it’s time to replace the B305, although that may not be your preferred course of action.