Canon does not officially distribute this tool to the general public through its standard Support and Drivers page. Instead, it is typically used by authorized service centers.
Security researchers have repeatedly found that many “cracked” versions of v4905 available on download portals contain: download canon service tool v4905
While compatibility varies by specific model, the tool generally supports the following series: Canon does not officially distribute this tool to
The V4905 tool is the "key" to un-bricking it without taking it to a repair shop. : While the printer is off but plugged
: While the printer is off but plugged in, hold the Stop/Resume button and then press and hold the Power button. While holding Power, press the Stop button 5 times (this varies by model, some require 2 or 6 presses), then release both.
: Allows for reading and writing to the printer's EEPROM to diagnose hardware issues.