Xerox will charge you £366 for an engineer to change to reset the admin password.
If you're ok to factory reset your printer then just do this:
That gets you into Diagnostics Mode. To do the factory reset:
Worked on my C400 hopefully it works for you.
Click on the 'admin' username, and password '1111' (that is four 1s).
If that doesn't work, find the serial # of the device, copy/paste that serial # in place of the password.
It will open a new window and prompt you to change the password, in old password section, put in the serial number and in the new password section, put in '1111' (or whatever it is you want).
It worked for me and i know... I ain't the 'lucky' kind.
Best of luck!
Thank you for your help. I'm definitely a novice and I'm having the same issue. Could you explain your answer a little more? What counters?