Errror code E 9 after restoring factory default, started after replacing cartridges with genuine HP

[JCT1ONLY]

 The printer started printing streaked or faded colors and gray instead of bold black, so I canceled printing and replaced the cartridges with new Hp cartridges, and it wouild not recognize them... tried several things including unplugging removing and replacing, even replacing the new with other new... finally gave up and restored to factory res restore and still cannot print.

[Anand_Andy]

Hi @JCT1ONLY,

Welcome to the HP Support Community

I understand you are facing a print quality issue with your HP  printer. Not to worry I will help you to get a resolution to resolve the issue.

E9 error

An E9 error occurs when there is an error after a printer firmware update or a printer reset. Reference Document: HP DeskJet, ENVY 6000, 6400 - Blinking lights and error codes

To assist better:

• Are you using genuine HP ink cartridges?

While you respond to that, let's print a Print Quality Diagnostic page -Post the Print Quality Diagnostic page here so we can help you further. 

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

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

If the issue still persists, I'm sending out a private message to assist you with the next course of action. 

Please check your Private message icon on the upper right corner of your HP Community profile Next, to your profile Name, you should see a little blue envelope, please click on it or simply click on this link.

Hope this helps! Keep me posted. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!