When I got rid of the graphical console on my mine, I simply had to plug the 
terminal in and set it for 9600/N/8/1.  Did not need to configure anything at 
all.  Simply turned it on and the console prompted appeared (after POST).

Dave.

Quoting Riccardo.Veraldi@fi.infn.it:

> 
> anyone of you knows how to enable serial console instead of graphics
> console on dec 3000?
> I have no way to go on graphic console now I have a working DEC 3000
> without monitor.
> 
> thanks much
> 
> 
> Rick
> 
> 
> 
> 
>