>I'm open to reinstalling the OS or just about anything.
The OS has NO effect on keyboard firmware,,
You will have to run firmware update again (and hope that you do not have limited write chip)
When login you have 2 lines, user,<enter> password (not echoed) <enter>
So, on the user line, see what the keyboard does, make a list, if the key echos as typed put a check after,,
else something like q = m (if you type q and get a m)
Probably you will be able to find out what to type to get a login and rerun flasher
OR
I have little experience, an on screen keyboard, mouse keyboard
But you still have to get logged in, so not likely
The OS has NO effect on keyboard firmware,,
You will have to run firmware update again (and hope that you do not have limited write chip)
When login you have 2 lines, user,<enter> password (not echoed) <enter>
So, on the user line, see what the keyboard does, make a list, if the key echos as typed put a check after,,
else something like q = m (if you type q and get a m)
Probably you will be able to find out what to type to get a login and rerun flasher
OR
I have little experience, an on screen keyboard, mouse keyboard
But you still have to get logged in, so not likely