: It is designed for Windows and often requires Compatibility Mode (e.g., for Windows XP) to run correctly on modern operating systems.
The Canon Service Tool V3400 (version 3.4.0.0) is a low-level Windows-based utility designed by Canon for repair technicians. It interacts directly with the printer’s EEPROM (electrically erasable programmable read-only memory) to: Canon Service Tool V3400 -v 3.4 0.0 Download- Extra Quality
Before running the software, the printer must be placed into Service Mode the printer but keep it plugged into power and the PC. button (red triangle) and press the While holding Power, release Resume and then press the (some models like MG series may require 6 presses). Canon Service Tool V3400 v3