Hi Susan12,
You can also try cleaning the encoder strip and resetting the printer. Please click HERE for the article that will cover these steps. The article is for a MX432 but the steps are the same for your MX439.
If that does not resolve your issue, the printer will need to be replaced since it is out of service life.
You would qualify for the Canon Upgrade program. This is for out of warranty units which have been diagnosed to require service or are incompatible with a new or upgraded system. This program allows you the opportunity to purchase a replacement product discounted from the list price. Free ground shipping is included with your purchase.
If you would like to take advantage of this offer, please call our Sales Department at (866) 443-8002 seven days a week, 8 AM to midnight EST. Let them know you have been working with technical support and that the Canon Upgrade Program was offered.
