SOURCE: CANON Pixma MP510
Check the shipping lock is off- consult the manual. Tell us the operating system you are working with.
SOURCE: All in One Scanner/Printer problems
Go to this link and type "cannot communicate with scanner" in the search box. Click Search. Then select the "ERROR: Cannot communicate with scanner" link. You will see several things to try to correct your problem. Usually, this error shows up if there is another USB device connected which prevents the computer from "seeing" the scanner, even though it can print without problem. So do try to disconnect any other USB device (except mouse or keyboard) and reboot the system.
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