Method 1: Do some basic troubleshooting
Your Canon printer may not be connected to your connection properly. So, it’s worth checking the connection of your printer.
If you are using a USB cable to connect your printer:
• Check if the cable is properly connected. If it isn’t, reconnect the cable and make sure they are properly seated into the ports on both your printer and your computer.
• Connect your printer directly to your computer without using a hub.
• Try connecting the cable to another USB port on your computer and see if this works for you.
• You may also need to experiment with another cable and see if there is any problem with the cable you’re using.
If you are using a network printer:
• Check your network connection as well as your network devices like your router and modem.
• View the network connection status of your printer and see if your printer is properly connected to the network.
• Reconnect or replace your network cable when necessary if your printer is using wired connection.
• For wireless printer, try reconnecting your printer to your home or work network.
You may need to consult your printer manual for instructions when reconnecting your network printer.

For more information: Canon printer support number | Canon printer tech support number