The problem: Failure of an electrical component may present a risk of fire. This creates a potential risk of burn injury or property damage due to fire.
Resolution: Check the serial number printed on a silver sticker on the back of your B640 faxphone. If your serial number is between UKK52923 and UKK55442, UKK60513 and UKK99999 or YKK02001 and YKK20000, stop using this machine immediately and call Canon USA tool-free at 888-280-7858 (8am-midnight Eastern time Mon-Fri and noon-8pm Saturday) for a free replacement. There is no charge for picking up your recalled machine. Canon asks that you not return the unit to the retailer where you purchased it.