When you encounter this situation first turn off the power, then remove the main controller circuit board, and finally replace the main controller circuit board and connect the plug to the main controller circuit board.
Canon 2204n is a copier under the Canon Group, Canon's product line*** is distributed in three major areas personal products, office equipment and industrial equipment, the main products include cameras and lenses, digital cameras, printers, copiers, fax machines, scanners, broadcasting equipment, medical equipment and semiconductor production equipment.