Random Cyan horizonal and vertical lines printing

[AnetKir]

I have an HP8600 all in one printer that started printing random Cyan blotches and lines on my printed paper and photo paper. Also everything color is printing with a Cyan hue. Printing in black and white still has horizontal and wavy blue lines. I reset printer by unplugging from power source even left unplugged overnight. I cleaned and aligned the printer heads though report didn't indicate an issue. Love my printer and wondering if a new print head kit would solve issue or something else I can try.

 

 

[Garp_senchau]

@AnetKir, Welcome to HP Support Community,

Thank you for posting your query; I’m here to help by guiding you through steps to resolve this issue

Thanks for sharing all those details and the nozzle check page — very helpful! 😊

Restart the Printer

1. Turn off the printer.
2. Unplug the power cord from the back of the printer.
3. Remove the cartridges.
4. Press and hold the power button for 30 seconds.
5. Plug the power cord back in.
6. Wai for few minutes and then insert the cartridges (let printer prompt for cartridges)
7. Turn on the printer

Deep Clean:

Run 2-3 rounds of cleaning, even if the first doesn't help.

Sometimes trapped air bubbles need several cycles to clear out.

Run HP Print and Scan Doctor (Windows only):

• Download and run the HP Print and Scan Doctor tool. Follow the prompts to diagnose and fix common printing issues.

Update Printer Firmware (Update the firmware on an HP printer | HP® Support)

• Go to the HP Customer Support - Software and Driver Downloads page. Enter your printer model number and search for the latest firmware update. Follow the instructions to download and install the firmware update.

Manual printhead cleaning:

Remove the printhead carefully.

Gently clean the printhead with a lint-free cloth and warm distilled water (NOT tap water).

Gently blot dry with lint-free cloth or paper towel.

Reinstall, do a clean cycle again.
(This is risky but worth trying).

Also, you may refer these guides:

HP Officejet Pro 8600 Printers - Fixing Poor Print Quality | HP® Support

Wrong or mixed colors in prints with HP 932, 933, 950, 951-959, or 962-969 ink cartridges | HP® Supp...

HP Officejet Pro 251dw, 276dw, 8600 Printers - Color, Black Ink Not Printing, Other Print Quality Is...

I hope this helps.

Please feel free to reply here if you have any questions or if you need further clarification on any of the steps. 

Take care and have a good day. 

If my response helped, please mark it as an Accepted Solution! ✅ It helps others and spreads support. 💙 Also, tapping "Yes" on "Was this reply helpful?" makes a big difference! Thanks! 😊

Regards,

[AnetKir]

I will try these steps this weekend and let you know if they resolved the issue! Thank you!

[Garp_senchau]

Hey @AnetKir.

Take your time—no rush at all. Just let me know how it goes when you're ready!

Regards,