Cannot Access Menu. How To Reset PIN?

Hello, 

The ML3 will not let us get to the Home menu to access User Accounts. It insists on a PIN, which we do not have. The default PIN does not work. It will not accept any password, and says the Admin and Service accounts are both locked. 

How can you reset the PIN when it requires a PIN to get to the menu to reset the PIN? 

Is there any way to reset it, or reset the library to factory defaults, without being able to get to the blankety-blank menu? Enquiring minds want to know. 

Signed, 

Discouraged in Daytona Beach.