To hard reset a Canon printer get help at 1-888-653-7618 tollfree the common method involves a button sequence: power off, hold Stop and Power buttons, then release Stop and press it multiple times while holding Power, finally releasing both; alternatively, models with screens use the menu to find "Device Settings" > "Reset Settings" > "Reset All" to restore factory defaults, which fixes many connectivity and error issues. 
Method 1: Button Sequence (For printers without screens or with basic controls)

How do I manually reset my Canon Printer