Canon Knowledge Base - Light flashes orange four times - Pro9500 / Pro9500 Mark II
Canon Support for PIXMA TS6420 | Canon U.S.A., Inc.
Canon Knowledge Base - Error: Light Flashes Orange Five Times - PIXMA iX6520
Amazon.com: Canon MG7720 Wireless All-In-One Printer with Scanner and Copier: Mobile and Tablet Printing, with Airprint™ and Google Cloud Print compatible, Gold : Office Products
Canon pixma lights flashing problem fixed. - YouTube