Epson M2120-M2128-M2129 Error 0x791B Epson M2120-M2128-M2129 Error Code 0x791B Display on Printer: Description and Troubleshooting If you encounter the error code 0x791B displayed on your Epson M2120, M2128, or M2129 printer, it indicates a printer head failure. This error occurs when the transistor temperature becomes abnormal, causing the head thermistor to detect an irregular temperature.…