HP OfficeJet Pro 8000/8500 Series Printers, black or red streaks
If you see colored streaks, and your printer is not out of ink and is not saying it is in need of a printhead change, then you need to clean the prinhead and do a calibrarte linefeed.
- on the display, wrench, tools, clean printhead, if thisfixes the problem, then "no" else "yes".
- if the gradient color blocks prints came out with improper bands, call HP support (may cost money if beyond warranty, you can purchase up to 3 years warranty).
- Tools, calibrate linefeed.
- exit the menu.