Q: Officejet 6500 Scanner Doesn't Work on iMac

I have a printer,scanner, fax Officejet 6500A.  Before updating my modem from my internet provider my wireless printing and scanning worked perfectly.  After adding a new modem only the printer works.  I purchased a USB cable to connect to iMac (running OS - El Capitan).  The printer works fine but scanner doesn't work.  I uninstalled HP applications, deleted printer from System Preferences, restarted the computer and reinstalled the printer with latest drivers and added the printer in System Preferences.  Printer works fine but still no scanner.  When calling up the printer/scanner in System Preferences I should see two options, one to print and other to scan.  Only printer queue appears.  Not using any apps, just what was supplied by HP. Any suggestions would be appreciated.

Tom