I've seen NUMEROUS posts from folks with the same problem:
The "Scan to Computer" function on the printer doesn't work, even though all other printer functions between the computer and printer work fine. Printing works fine. Scanning from the computer works fine.
The printer's display shows the computer name when Scan-to-Computer is selected. But when the scan is initiated, I get a message on the computer:
"Scan failed - an error occured while communicating with the scanner"
and a message on the printer:
"No Connection - no computer is connected..."
But of course the computer IS connected!
On the Mac, the HP Utility's "Enable Scan to Computer" button is grayed out, with the explanation that the HP software required for Scan to Computer could not be located. Nothing I do let's me enable it.
Numerous posts on this forum, for this and other HP AIO printers, say to uninstall all the HP printer software and drivers, repair disk permission, reinstall the Full Feature printer software, and reinstall the printer drivers.
Did all that multiple times. Same problem.
Scan-to-computer used to work at one time and I used it routinely. Not sure exactly when it stopped, but may have been after upgrading to OS10.9.
Has anyone actually solved this problem? All the posts I've seen on this problem seem to end without resolution.