: You must use version v4720 or higher for newer models. Using an older version (like v3400) on a newer printer can permanently lock the printer's service mode, making it unfixable without a motherboard replacement. Usage Tips
: The tool only functions if your printer is manually placed into "Service Mode" first. This typically involves holding the Stop and Power buttons in a specific sequence (e.g., holding Power and pressing Stop 5 or 6 times). service tool v4720 download verified
Enables changing the printer’s destination region settings. : You must use version v4720 or higher for newer models