provide this service tool as a public download on their official consumer support sites like Canon India

The green power light should flash a few times and then stay solid. Your computer may notify you that new hardware has been detected. Step 2: Running the Reset Program Connect the printer to your Windows PC via the USB cable.

According to technical resources like 2Manuals , the V3900 tool supports a large number of printers, primarily:

For newer printers, check if your model supports the official Canon IJ Printer Assistant Tool for standard maintenance like deep cleaning.

The Canon Service Tool v3900 is an official diagnostic and maintenance software used by technicians. It communicates directly with the printer's firmware while the device is in a specialized hardware state called . Key Functions

Note: For newer printers, higher versions of the Service Tool (like v4905, v5103) may be required. How to Find a Safe Canon Service Tool V3900 Download

If you decide to proceed with downloading and using this utility, follow strict safety protocols to protect your PC and your printer. Check File Authenticity

This function prints a comprehensive report of the printer's internal EEPROM data. This includes the waste ink absorber counter value, total print information, error history, and more. It is an excellent way to confirm that a reset was successful.

This happens because Canon printers feature built-in counters that track internal ink waste. When these counters hit 100%, the machine stops working to prevent ink leaks.

Windows is blocking the tool's access to the USB communication stack.