Epson PM400 Error 0x9 B Epson PM400 Error code 0x9 B Display on Printer: Printer Head Failure, Transistor Abnormal Temperature Error, Head Thermistor detects Abnormal Temperature, Main Board Failure. Experiencing an Epson PM400 error code 0x9 B on your printer can be a frustrating ordeal. This error indicates various issues related to printer head failure,…