Scanning function of HP Officejet Pro 8500
I have recently upgraded to El Capitan and now the scanning function of my HP Officejet Pro 8500 a909 does not function.
I have been to HP support site which is not very helpful.
I have uninstalled and reinstalled the printer but the scanning function has disappeared.
My next task was to load HP Easy scan. this loaded finds the printer but then advise the printer is not connected to the iMac.
Any suggestions please to get my scanning function back
iMac, OS X El Capitan (10.11)