I have a Z23 and last night I printed an item fine then 5 minuates later it would not print.Today it won't print and when I turn off the printer and turn back on it runs paper thru at start and I get a Printing is done message. It hasn't printed but I get a message that it can't read something I do think it has to do with the printer.

Brenda Pulley, June 2008

Have you tried resetting the PC that the printer is attached to?
Sometimes the print buffer gets stuck and it needs a reset to clear it.

Robert Welsh, July 2008