@slandch
Welcome to the HP Forums. I would be happy to help you with your HP Officejet 6500 Printer. I understand that it does not print in black and you have already done some preliminary troubleshooting.
Don't worry though as I have a few steps to determine the issue and find a solution as well,
Check the print settings.
Print a Print Quality Diagnostic Report.
-
On the product control panel, press the Setup button (
) until Print Report displays, and then press OK.
-
Press the Right Arrow button (
) to select Print Quality Report, and then press OK. The report prints.
Figure : Example print quality report
.
Check the test page for defects.
Make sure that the cartridges are properly vented and seated correctly.
Use an automated tool to clean the printhead.
Clean the printhead manually.
Click here and refer the document to perform the above steps.
Let me know if that helps.
Cheers.
Sandytechy20
I am an HP Employee