My Envy 7855 began leaving fine, horizontal lines, every 0.5 inch apart, across color print jobs.

[Unmasked4now]

Product is Envy 7855, using Instant Ink, Mac OS X 10.11 El Capitan. I've  tried recommended automated cleaning and realigning to no avail.

[asmita6658]

Hi @Unmasked4now

Welcome to the HP Support Community. I'd be happy to help you with the print quality issue. 

Appreciate you trying the steps. 

To better assist you - 

1.) What's the application you are trying to print from? 

2.) Are you experiencing the same issue while making a copy as well?  

Try updating the printer's firmware - HP Printers - Updating or Upgrading Printer Firmware

Also, have you checked you HP Instant Ink account page? Your Instant Ink account page will have notifications if there are any issues with the account or recent cartridge shipment, it will even provide solutions on how to fix the issue. You may log in to your HP Instant Ink account page from here.

If the suggested information can't be found, please send us a private message with your Instant Ink account details or you may also respond to the private message I've sent out and I'll help you out, accordingly. Check next to your profile Name, you should see a little blue envelope, please click on it. 

Let me know. 

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Have a great day!