| Error / Symptom | Likely Cause | Solution | |----------------|--------------|----------| | “Cannot communicate with printer” | Printer not in Service Mode | Re-enter Service Mode (see Part 2.3) | | Tool crashes on launch | Missing DLL or antivirus block | Restore quarantined file; disable AV | | “Driver not signed” error (Windows 10/11) | Driver signature enforcement active | Reboot with F7 (disable enforcement) | | USB device not recognized | Faulty cable or USB port | Try different cable/port; restart PC | | Waste ink reset works, but error returns | Main and Platen not both checked | Repeat reset, check both boxes | | Tool shows “Unknown model” | Firmware too new | Use newer version (e.g., v5612 or v5615) |

are you trying to reset? I can provide the exact button sequence for Service Mode for that unit.

I can’t host the file, but a simple web search for “canon service tool v5610 download” leads to trusted communities.

This powerful utility resets waste ink counters, changes printer regions, and performs advanced maintenance. However, — use it carefully.