[rescue] newbie question

[Alys]

So I have an old "Super Workstation II+/50" and when I boot it up, I get:

"Boot device: /sbus/le at 0,c00000    File and args:
Internal loopback test -- Did not recieve expected loopback packet.
Can't open boot device

Type b (boot), c (continue), or n (new command mode)"

I do not currently have it connected to a network. I was wondering how I 
would get it to boot from here. Any help would be appreciated.

                                                Thanks