I've been working to get the same PTJBOD board set up as well -- I now have the IPMI page loading but I can't log in. I tried the user/pass ADMIN/ADMIN that was standard for SuperMicro IPMI before 2019, but no luck. Lowercase didn't work either. I understand that since 2019 SM systems have been shipping with unique passwords printed on a sticker as described in this manual:
Supermicro SC847 JBOD Manual Online: bmc, Bmc Admin User Password, Ip Address. The Control Board Provides Remote Access, Monitoring And Management Through The Baseboard Management Controller (Bmc) And Other Management Controllers Distributed Among Different System Modules. There Are...
www.manualslib.com
I got my JBOD board by itself and there's no password sticker like the one shown in the manual attached to it. There is a sticker on the big power connector at the side of the board that says "IPMI:" followed by a 12-digit hexadecimal number, and I tried using that as the password but it didn't work. It could be that this board had its ADMIN/ADMIN pass changed to a random pass via a firmware update so it's not written anywhere.
From what I've read it sounds like there's a way to reset passwords using the ipmicfg utility, but that's for motherboards that can connect input devices and USB drives. Does anyone know if there's a way to retrieve or change the password for this board? Thanks.