Epson PX-M740F Error 0xF4 The Epson PX-M740F is a highly efficient printer that offers exceptional printing solutions. However, at times, users may encounter an error code 0xF4 with the display message “PF PID lock error. Encoder failure. PF motor failure. PF Mechanism overload. Cable or FFC disconnection. Motor driver failure. Main board failure.” When faced…