7880, Mac Pro (2009) running OS 10.11.5, using mixture of Cone & Epson inks for over a year. I replaced the waste ink thingy a month or so ago, and removed & shook all cartridges after that.
In middle of a batch print job on Epson Exhibition Canvas today, got an error msg saying, "Ink Cartridge Error Replace Cartridge" in the Photo Black slot, which has had a Cone cartridge for quite some time. The printer display shows a flashing X on this cartridge. I have tried turning printer off & on, removing/reinserting cartridge, removing roll paper, and replacing the Cone cart with an Epson T6031 photo black cartridge. The error remains. Pressing the left-right buttons has no effect.
Any suggestions greatly appreciated.
Eugene Norris 727 865 8518
876 Ponce de Leon Drive
Tierra Verde, FL 33715