Some 2021 versions require you to click "EEPROM Clear" first. Do NOT use "Clear All EEPROM" unless you have a backup – that erases serial numbers and region data.

In 2021, the Canon MB2140 service tool remains a relevant and essential utility for maintaining and repairing the printer. With the increasing demand for remote work and digital documentation, printers like the Canon MB2140 continue to play a critical role in many homes and offices. The service tool ensures that the printer operates at optimal levels, minimizing downtime and reducing the need for costly repairs.

He grabbed a USB cable and connected it directly to the MB2140. The machine made a small whirring noise, recognizing a connection, but the error remained.