Open the switch in putty, then keep putty up pull the power on the switch then plug it back in and bash the hell out of your B key and dont stop until you see it typed on your screen at that point you should be in the bootloader, when I do it I have one hand on my power cord and the other hovered over the B key i do this with my laptop.Yes used management port. As for the tftp maybe that is the problem? I used the listed commands from the documents to set the IP to 10.0.2.2 . I use 10.0.0.xxx for all my homelab stuff but wasnt sure what ip were unused in that range. Maybe part of the issue? I didn't change anything inside the tftp program. I may have misunderstood the documentation but I was under the impression that the included tftp program was pre-configured and not to be messed with.
I'll try again in the morning and get screenshots of the bootloader window, tftp settings and whatever else may help.
I didn't get any notifications that Windows Defender was blocking anything but I'll try turning that off also. Whatever the issue is I can almost guarantee it is user error, like I said this is all new to me and I had to watch a YouTube tutorial just to establish a serial connection through putty.
One thing that was throwing me off was that most of the commands I would enter from the documentation didn't seem to get any reply from the system and usually anything that did get a reply was saying that it was an incomplete or invalid command or something like that. I'm not sure if that is normal or not but it seemed a whole lot like I was just typing to myself. I'm more familiar with using a terminal for 3D printers and they usually output some sort of reply.