When I print on my HP 6520, nothing-the page is blank. However when I print a "Print Quality Diagnostic", everything is working properly, (ie. ink levels). If I print an email containing color, that prints fine but the (black) lettering doesn't print. No error messages pop up. It just stopped printing words. My black ink is full, btw.
I understand when you print from your printer the pages print blank.
Don't worry I'll try to help you out.
Did you make any changes to your printer?
Are you able to make a copy from your printer?
Please try the steps recommended below.
Click the Apple menu, and then click System Preferences.
Click Printers & Scanners, Print & Scan, or Print & Fax.
Right-click (or Control + click) anywhere inside the Printers window, and then click Reset printing system.
Click Reset or OK.
If prompted, type your username and password, and then click OK.
The printing system resets.
Turn off the printer, wait 5 seconds, and then turn on the printer.
Wait until the printer is idle and silent.
In the Printers window on the Mac, click the Add button.
Select your printer from the list, and then click Add.