Addendum: The WinNT 4.0 printer driver has a setting which lets the printer start on demand.

That is, after activating that setting one can let the printer be switched off (but the power cord connected ;)) and it will start up on request i.e. when a job is in a queue even from Linux. I have not found (and not really searched for) that feature under Linux.

More Information: I discontinued using the S400 due to permanent problems with the ink. If one doesn't use the printer on a daily basis but rather ervery other week the ink will dry in the jets and even the intensive cleaning routine doesn't clear it (I had to remove the head and soak it in solvents). After several times clogging now the head seems to be damaged (don't know whether that is so or just a erroneous error message). So now I bought a laser printer -- the toner won't dry up on me for sure ;).

P.S.: Can't sell or even donate the thing ... "Just throw it away" is the universal answer :(.