Hello ang31,
Welcome to the Forums:)
I noticed that you are receiving an error message on your Officejet 4500 informing you of a scanner failure. This issue may be resolved by troubleshooting.
I have located the help guide you will need for this: A 'Scanner Failure' Message Displays on the All-in-One Control Panel and You Cannot Scan, Copy, or Fax
If the troubleshooting does not help resolve your issue, I would then suggest calling HP's Technical Support to see about further options for you. If you are calling within North America, the number is 1-800-474-6836 and for all
other regions, click here:
http://www8.hp.com/us/en/contact-hp/ww-contact-us.html
Good luck!