Hi mugz69,
To clear the 1403 error, please follow the steps in this article to reseat the ink and printhead:
https://support.usa.canon.com/kb/s/article/ART143853
If the 1403 error persists, your PIXMA MX722 would require service. You are eligible for Canon's Upgrade Program. This is for out of warranty units which have been diagnosed to require service, or for some reason are incompatible with a new or upgraded system. This option allows you a one-time opportunity to purchase a replacement product, discounted from the list price.
If you would like to take part in this option, please call our Sales Department at (866) 443-8002 Monday through Saturday, 9am to 9pm. Let them know you have been working with technical support and the Canon Upgrade Program was offered.
