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He found a thread from 2018, buried under five pages of arguments about waste ink tanks. A user named 'MechanicZero' had posted a link. "This is the clean one," the comment read. "V5204. Original. No surveys. For the MX series. High quality rip."

: There are reputable (though often paid) third-party utilities like the WIC Reset Utility that provide a more user-friendly and safer interface for resetting ink counters compared to the raw Service Tool.

If you use an older tool (like v3400) on a newer printer, you risk permanently locking the service mode on your device. Security and Safety Warnings

Before the tool can communicate with your device, you must enter manually: Canon service tool: v5204 or latest? - PrinterKnowledge

The Canon Service Tool V5204 is a software utility developed by Canon Inc. to help diagnose and repair issues with Canon printers. This tool is designed for technicians and advanced users who are comfortable with troubleshooting and repairing printer issues. The V5204 version of the tool offers advanced features and improvements over its predecessors, making it a valuable resource for resolving complex printer problems.