If you have tried everything and your driver still fails, it may be time to consider that the printer’s main controller board (formatter board) has failed—a common issue in lasers of this age. In that case, a replacement FAX L140 unit can be found on secondary markets for less than $50, and the driver installation process begins anew.
Last updated: October 2025. Information is based on Canon’s legacy support documentation and community troubleshooting forums. canon fax l140 printer driver