Avoid trying multiple versions of the service tool in a single session. If the printer enters a locked state due to incorrect software use, the logic board may need to be replaced.
Canon does not provide an official public download for this tool; it is typically intended for authorized service centers. Many sites offering free "V4905 downloads" may bundle malware or Trojan Horse viruses Canon Service Tool V4905 Download -
The Canon Service Tool is official maintenance software used by Canon service centers. The V4905 version is a specific iteration designed to support newer printer models that previous versions (like V3400 or V3600) could not recognize. Avoid trying multiple versions of the service tool
Canon Service Tool V4905 is a specialized software used primarily to reset the waste ink absorber counter on various Canon Pixma printer models when they encounter errors like Important Safety Warning This tool is not officially released Many sites offering free "V4905 downloads" may bundle