What specific is showing on your device? Which operating system (Windows version) are you running? Share public link
While holding Power, press the button 5 times in a row. Canon Printer Service Tool V3600
The V3600 is a direct iteration of its predecessor, V3400. In fact, it's known as of the V3400 tool. While its interface is largely similar, it was released to expand compatibility to newer printer models. What specific is showing on your device
If you need help finding the software download or troubleshooting a specific error code, please tell me: What do you have? What operating system (Windows version) are you running? The V3600 is a direct iteration of its predecessor, V3400
The Service Tool V3600 is a proprietary, low-level utility designed by Canon exclusively for authorized service centers. Unlike the standard drivers or maintenance software available to the public, this tool communicates directly with the printer’s EEPROM (Electrically Erasable Programmable Read-Only Memory).
Other service tool versions (like V4720 or V4905) for newer models. Service Tools for Canon Printers | PrinterKnowledge
Release the Stop/Reset button while continuing to hold the Power button.