Canon LBP6780x Manual page 839

Unconnected
<Question 6> Check the settings for [Interface Selection].
"[Setup] Menu ([Interface] Options)"
[USB] is set to [On].
[USB] is set to [Off].
<Question 7> Can you print a test page in Windows?
"Basic Operations/Various Information for Windows"
Printable
Not printable
<Question 8> Is the port to be used selected correctly?
"Basic Operations/Various Information for Windows"
Selected
Not selected
Connect the cable properly.
"Connecting to a Computer"
To <Question 7>
Set it to [On].
There is no problem with the printer and driver.
Check the printing preferences in the application.
To <Question 8>
To <Question 9>
Select the correct port.