Hacking a N.T 4.0 box

I have a N.T 4.0 member server box that was removed from a domain for troubleshooting purposes. It is now part of a workgroup by itself. The server has raid 5 and can be pinged. I tried many generic passwords with no luck. The server is not a production server, it is on a private segment so it does not show up in the work group in network neighborhood. I have locksmith but I am unsure of it will work since it is installed on the PDC.