If the Machine Does Not Operate
If a problem occurs while you are using the machine, check the following before contacting your local authorized Canon dealer.
Check This First
Is a message displayed on the touch panel display?
A message is displayed on the touch panel display when an error or a problem occurs while operating the machine.
Has the Main Power indicator gone out?
If the Main Power indicator does not light up even though the power switch is ON, check the power plug.
Is 
lit?
If it is lit, press to cancel the Sleep mode.
to cancel the Sleep mode.Is the machine connected to a computer correctly?
Check the network connection of the machine and the computer.
If the machine does not respond to computer operations
Restart the machine.
If the machine does not respond even though its power is turned ON, turn the power OFF. Confirm that the power cord is connected correctly. Turn the power back ON.
Check whether the driver is installed correctly.
For information on installing the driver, see Installing Drivers.
Check whether the IP address of the machine is correct.
Check the IP address settings, and change them if they are incorrect. For information on the settings, see Setting up Using the Setup Guide.
When the authentication screen (login screen) is displayed
Log in as a registered user.
When the authentication screen (login screen) is displayed, you must log in as a registered user to continue operating the machine.