Corrupted admin pages -- no admin access

I have a similar problem with a Duo V1. I was having a few minor issues and did an OS reinstall. That rather messed up the Frontview interface--it was pretty much there but menu items and buttons all said "unavailable" or something like that. You could still sort of navigate around and do things but it was really awkward. I tried another OS reinstall and Frontview became unusable. I did two RAM tests back to back and they both passed. One of the OS reinstalls must have killed my SSH access. With that gone and while I still had access to all the shares, I backed everything up. I set aside disk 1 and formatted disk 2 in a PC. I put disk 2 in slot 1 and did a factory reset. The Frontview interface was still unusable, looking just like it did after the second OS reinstall. Would a USB boot fix this? How does one do that? Are there other options to get this functioning again?