Photosmart 5520 Printer

[Mark300]

I have an iMac (2013) running IOS 10.15.7 and two HP printers (wifi set up), a 5520 and a 6975. There are no problems with the 6975. Until a number of weeks ago the 5520 ran perfectly well. Now when I try to print (whether over the wifi or with a usb cable) I get a blank page. When I run the Print Quality Diagnostic software the 5520 summary report prints the Cyan, Magenta and Yellow colors in the boxes but not the Black. Yet the black letters on the summary report print perfectly just not in the black box portion where the black should be displayed. I have replaced the print cartridges with no change. Same thing happens when I print from my iPad. My limited research indicates this might be related to Apple and/or HP revoking the print software "certificates." After installing "HP Smart" I have tried to update the 5520 software and firmware from the HP website but when I download the supposed new software/firmware and run it I get a notice on my computer that there is nothing available for my computer.  Can anyone explain what is going on and how to fix it other than trashing the 5520? Thank You.

[KrazyToad]

@Mark300

Welcome to HP Support Community

I would like to help

Please follow the instructions in Step 10 from this Link: https://support.hp.com/in-en/document/c03955472 to clean the printhead

Firmware https://support.hp.com/in-en/document/ish_1776648-1643972-16

Thank you

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