All error codes By model: T1100T1500T1700T2300T2500T610T730T830T930Z5200Z6Z6200Z9 Model T2500 Error Code 74:01:00 Problem Description Error uploading firmware update file Corrective Action Options Turn off/on. Ensure connection to computer and printer is functioning, Try again up upload the firmware update file. Schedule Service Call ⭢ (301) 340-0000 Email ⭢ Contact Us