If you are a hobbyist, consider reaching out to manufacturer training programs or community forums that offer legitimate, low-cost diagnostic alternatives. If you are a shop owner, factor an official license into your pricing—it pays for itself in liability coverage and support.
Note: Newer printers often require updated versions of the tool (e.g., V530 or V3400). Attempting to use V4720 on unsupported models can cause the software to freeze. service tool v4720 download repack
Some newer Canon models allow a manual reset of the waste ink counter using only the buttons on the printer panel. Search for your specific model's manual reset instructions (often involving holding the Stop/Reset button for 30 seconds). If you are a hobbyist, consider reaching out
the printer but leave it plugged into the power and USB. Hold the Stop/Resume (Triangle) button. While holding Stop, press and hold the Power button. Release the Stop button (while still holding Power). Attempting to use V4720 on unsupported models can
: Launch the ServiceTool_v4720.exe . If you see "Error 006," your printer is not in Service Mode.