Error Code: 12 Printer Open Or No EP

Printer Error - 12 Printer Open Or No EP
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Error Message: 12 Printer Open Or No EP

HP Error Code		12 Printer Open Or No EP
Printers Affected		IIP, IIP Plus, IIIP, 4P, 4MP
Description		The printer is not closed properly, the toner cartridge is missing, broken, or defective, or the cooling fan is not working. Plugging a 220V model printer into a 120V power source can also result in this message. Ensure the printer is firmly closed. If the message persists, consult service.