After working flawlessly over a decade, my iP4600 printer suddenly insists its printhead is incompatible. I replaced it per the 1401 code, since cleaning had no effect. I'm still getting the code and five orange blinking lights. All carts are new and filled. It runs off an old Mac Mini with OS 10.7.5 Lion. I realized the printer has been retired, but I only print maybe three times a year at most and can't justify a new one. Any insights out there?
