Ok, problem solved on a 3064 switch. I used aggressive ctl-C before the GRUB prompt and I moved from a minicom based network terminal to a direct attach laptop at the same console port. Then it was just following the instructions already mentioned.
I am having a hell of a time finding the right moment to press <CTL>-]Here's an example. Can someone help me understand at what exact moment I press the key sequence? This is a new switch for me, yesterday I removed it from the box and entered the i...