Epson PX-M5040F Error 0x84 Epson PX-M5040F Printer: Error Code 0x84 Display and Troubleshooting Error code 0x84 displaying on your Epson PX-M5040F printer indicates a “Device gap abnormal error.” This error usually occurs during the manufacturing process and seldom happens during regular use. The device gap abnormal error refers to a misalignment or inconsistency in the…