HP printer diagnostic page looks like this, ink is nearly full and relatively new : r/printers
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HP Officejet Pro K5300 and K5400 Printer Series - Print a Diagnostic Page | HP® Customer Support
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Download HP Print and Scan Doctor - Free Diagnostic tool - ebugg-i.com
Samsung Printer Diagnostics - Download
Samsung Printers - Samsung Printer Diagnostics Installation and Functions | HP® Customer Support
HP Designjet 4000 Printer Series - Printing and Interpreting the Image Diagnostic Print | HP® Customer Support
HP Deskjet, Photosmart 6520 Printers - Black Ink Not Printing, Other Print Quality Issues | HP® Customer Support
Diagnostics - Printix Administrator Manual - 1
Use Diagnose & Fix in HP Smart to repair common printing issues (Windows, macOS) | HP® Customer Support
To evaluate the Print Quality Diagnostic Page - HP Officejet 4620
PC Diagnostics - Solve your PC Issues
