Canon i-SENSYS LBP6670dn User Manual page 840

<Question 3> Check the
The (Online) indicator is on.
The (Online) indicator is off.
<Question 4> Can you print Configuration Page?
"Checking the Printer Settings"
Printable
Not printable
<Question 5> Is the USB cable connected properly?
Connected
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(Online) indicator.
To <Question 4>
The printer is offline.
Place it online.
"Online and Offline"
To <Question 5>
If an error message is displayed, solve the problem following the message.
"A Message Appears in the Control Panel"
Try the following points.
If you are using a hub, connect the printer to the computer directly.
If you are using a long USB cable, replace it with the short one.
If you have another USB cable, use it.
If printing does not work, proceed to <Question 6>.