Canon LBP7780CX User Manual page 413

If a Message Appears
A message will be displayed if there is anything wrong with the settings. See Steps 6 to 10, and check the settings.
12
Click [OK].
13
Perform a hard reset or restart the printer.
After performing a hard reset or restarting the printer, the settings are effective.
NOTE
To perform a hard reset
You can perform a hard reset using the following procedure.
1. Click [Settings/Registration].
2. Select [Device Control] from the [Output/Control] menu.
3. Select [Hard Reset], and then click [Execute].