I recently set up an HP Officejet 6500 on a Windows 7 PC. I need to scan some items and I can't get it to work using the "scan" on the desktop or the "scan" on the printer.
i think its problem with your software try to uninstall old software and install latest one this may fix the problem
here is the methods how to install
Method 2:
You may check if you have the latest drivers installed for the device. You may refer to the below link for getting the latest drivers and check. HP Officejet 6500 driver
hope this help
Good Luck..