only prints or copies blank pages

[JLP771]

Just set up printer with Mac Catalina everything connects fine but when print command sents the printer feeds out the correct number of pages for the document but nothing printed.  Ink cartridges full.  The same thing happens when I use the printer in copy mode, the output is just a blank page.

[Jay_G24]

Hi @JLP771

Welcome to the HP Support Community. I'd be happy to assist you with the  "print quality" issue. 

 let's print a Print Quality Diagnostic page -

On the control panel, swipe down to open the Dashboard, and then touch the Setupicon.

Swipe up on the display, touch Reports, and then touch Print Quality Report.

Post the Print Quality Diagnostic page here so we can help you further. 

You may also refer to this document with steps to fix " Print Quality Issues" issue applicable for your printer -  Print Quality Issues

The printer you own can work in single-cartridge mode, wherein the printer will be able to print with one cartridge in the printer.which will help us identify if its a cartridge issue or a printhead issue 

To try single-cartridge mode follow the below steps:

remove the black ink from the printer, leave the color in and try printing 
then remove the color ink and, insert the black  in and try printing 

Also, try updating the printer's firmware - HP Printers - Updating or Upgrading Printer Firmware 

Hope this helps! Keep me posted. 

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