All error codes By model: T1100T1500T1700T2300T2500T610T730T830T930Z5200Z6Z6200Z9 Model T1100 Error Code 79:YZ Problem Description Generic Firmware error. Corrective Action Options Turn off/on. Check that the Printer has the latest Firmware version Schedule Service Call ⭢ (301) 340-0000 Email ⭢ Contact Us