When prining with BLACK printer skips some lines

[Oranguavol]

HP ENVY Photo 7800 Printer

[Nal_NR]

Hi @Oranguavol,

Welcome to the HP Support Community. 

I'd be glad to help you! 

It’s frustrating when your printer isn’t delivering clear results—let’s work on getting this resolved for you.

• Have you recently replaced or refilled the black ink cartridge?
• Did you try running a printhead cleaning or alignment from the printer’s maintenance tools?
• Are the skipped lines consistent across all documents or specific to certain types of prints?

Perform the following tasks in the order given. Use the printer after each task to see if the issue is resolved.

Clean the ink cartridges

• The printhead could be clogged, and you might need to clean the printhead several times to restore print quality. Use an automated tool from the printer control panel to clean the printhead.
• CAUTION:
• Never turn off the printer when ink cartridges are not installed. To avoid issues that require cleaning the printhead or that can damage the ink system, always replace ink cartridges as soon as possible, and always turn off the printer using the Power button.
• On the printer control panel, swipe down to open the Dashboard, and then touch the Setup icon .
• Swipe up on the display, and then touch Printer Maintenance
• Touch Clean Cartridges, and then touch Continue.
• After cleaning completes, a Print Quality Diagnostic Report prints.

• Examine the Print Quality Diagnostic Report.
• If the print quality is unacceptable, touch Clean Again to continue the next level of cleaning. If necessary, repeat these steps for the third cleaning cycle.
• Note: If the printhead is badly clogged, it might require another cleaning cycle. If so, wait 30 minutes before you perform all three levels of cleaning again.
• If the print quality is acceptable, touch Done.

Click here for the remaining steps. 

Update the firmware. Click here

Hope this helps! Keep me posted for further assistance

Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.

[Oranguavol]

I emailed Elohi a detailed resposnse. My problem continues after multiple cleaning; alighning; and cartridge replacement.

No response.

[Nal_NR]

Hi @Oranguavol ,

We apologize for the inconvenience. The issue seems to persist even after attempting the troubleshooting steps mentioned above.

This might require one-on-one interaction via remote assistance to fix the issue over the phone. 

I've sent you a private message with further instructions. In order to access your private messages, click the private message icon on the upper right corner of your HP Support Community profile, next to your profile Name or simply click on this link.

If the information I've provided was helpful, give us some reinforcement by clicking the Accepted Solution button, that'll help us and others see that we've got the answers!