Hi Michael74,
Thank you for visiting the HP Support Forums and Welcome. I have read your thread on your Officejet 6500 e710n printer not being able to print. Try shutting if off, then pulling the power out of the back for about a minute. Plug it back in and turn it back on.
If that does not resolve the issue try the HP Print and Scan Doctor. The HP Print and Scan Doctor is a diagnostic tool that will help repair issues.
Please let me know how this goes.
Thanks.