Printer not connected; will retry in 30 seconds

[Michael Hennebry]

I recently replaced the black ink cartridge on my PSC 1510.
Before it printed badly.
Now it pretty much doesn't print.
I can get a self-test page by pushing buttons.
I cannot print a test page through CUPS.
I get the message
"Printer not connected; will retry in 30 seconds".
It's connected.
Restarting CUPS didn't help.
What is the magic spell for getting it to print again?

I'm running FC6.

-- 
Mike   hennebry at web.cs.ndsu.NoDak.edu
"Horse guts never lie."  -- Cherek Bear-Shoulders