Print quality suddenly degraded - HP Deskjet 3835

[Suvajit_3835]

My Printer print quality suddenly degraded.

1) Ran all utilities viz, Clean cartridge, printer alignment, but no luck.

2) Ink Level is sufficient as per test print page and showing the same in HP Smart app.

3) Genuine HP Ink HP 680 installed.

4) Kindly see attached test print page, and let me know what I can do to improve print quality. Default print quality is set in the printer.

Demo PrintTest Page

[Valsimot]

Replace both black and colour ink cartridges and your printer will print fine again.

[Suvajit_3835]

But Ink Level is showing satisfactory, Why I need to replace cartridge when Ink level is OK.

[Valsimot]

Ink level is just an estimate and ink cartridges need replacement when print quality is not acceptable. You have done cleaning cycles and the print quality is still bad cartridge replacement is needed. It's explained in the user manual.