Canon i-SENSYS LBP6670dn User Manual page 867

If the status of the paper feeder is not obtained
Remove the paper feeder once, and then install it again.
If the status of the paper feeder cannot be obtained even by installing it again, see the following and make sure that
the printer and computer can communicate with each other.
"Printing Cannot Be Performed (USB
"Printing Cannot Be Performed (LAN
"Printing Cannot Be Performed (via the Print
4
Click [OK].
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