Alas, (1) the "import from scanner ion "Preview" is light grey (i.e. inactive), (2) no device appears in the "Image Capture" window [device (0)] and (3) in "Print and Scan" preference , the scan button opens to a window which give me a button "open scanner" but, once I click on that button, I get a new light grey window with three buttons, none of which is active (hide details; overview; scan; all in light grey, i.e. inactive).
Therfore there is nothing I can do of the steps you recommend. I am deeply disappointed.
Seattle 666