All error codes By model: T1100T1500T1700T2300T2500T610T730T830T930Z5200Z6Z6200Z9 Model T930 Error Code 74.08:04 Problem Description Firmware update problem Corrective Action Options Turn off/on. Try again to update the firmware. Download the firmware file again, as the file that you have may be corrupted. Replace the front panel Schedule Service Call ⭢ (301) 340-0000 Email ⭢ Contact Us