Print problem after changing cartridges

[WearyEric]

Printer was working OK but ink levels low. After changing all 4 cartridges it now prints  horizontal bars across the printout. Internal test page has 6 colored blocks across the bottom of the page, each of these has a line througjh the middle. unfortunately old cartridges were throw away and I can't recover the. Tried haes cleaning several times, no effect.

[Elohi_NR]

Hi @WearyEric,

Welcome to the HP Support Community. 

I'd like to help!

Update Firmware

If the firmware does not fix the issue, try the steps from this document. 

Hope this helps! Keep me posted for further assistance.
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!

[WearyEric]

Non of the suggestions helped, print still has harizontal bars, see attached picture

[Elohi_NR]

Hi @WearyEric,

We are sorry that the issue is not resolved when the above troubleshooting steps were performed.

Either the ink cartridges are faulty or the printer needs to be checked. 

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!