Canon Service Tool V5204: 2021

Connect the printer directly to your Windows PC using a (Wi-Fi will not work for this process).

The Canon Service Tool v5204 remains an indispensable utility for Canon printer owners facing waste ink errors or needing advanced diagnostics. While it's not an official Canon product and carries some risks, the right-to-repair community has embraced this tool as a cost-effective alternative to throwing away perfectly functional printers.

While still holding the Stop button, press and hold down the Power button. The power LED will light up.

When this happens, your printer locks down and refuses to print. This is not a hardware failure. It is a built-in safety counter designed to prevent excess ink from overflowing into your machine.