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I am using MacOS 10.14.2 with a Mac Pro and have an MF4770n Cannon printer.  This printer has been a work horse for the past 5 years printing thousands of pages.  Today it will not print.  The print Queue show that the file is being sent to the print...
The computer and the scan function do not connect with each other.    I can print but not scan.  Not sure what to do?