This document applies to the HP Officejet Pro L7500, L7600, and L7700 All-in-One Printer Series.
note:Ink level warnings and indicators provide estimates for planning purposes only. When an indicator shows low ink levels, consider having a replacement cartridge available to avoid possible printing delays. You do not need to replace cartridges until you are prompted to.
note:To purchase paper in the United States and Canada, go to the HP Store.
Figure : Horizontal streaks in printout
Continue with the following troubleshooting steps if your printout contains horizontal streaks, or other print-quality issues besides vertical streaks.
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Figure : Vertical streaks in printout
Do not replace cartridges or printheads for vertical streaks in a printout. Instead, check the paper as described earlier in this document, or search for a document that covers this issue. Vertical streaks in copies can often be fixed by cleaning the scanner glass.
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note:Incorrect bundling of the ink tubes does not directly cause print quality problems, but it is an issue that must be corrected. When the printer has been serviced, continue with the next step in this document.
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Windows only: If you are experiencing garbled, jumbled or illogical text, incomplete printouts, or missing text or graphics, go to Continuous Pages of Strange or Garbled Characters Print in Windows (c01954177).
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caution:Wait until you have a new printhead assembly available before you remove the cartridges. HP recommends that you do not leave the cartridges outside the printer longer than 30 minutes. This could damage both the printer and the cartridges.
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Figure : Streaked black, red, or green color blocks - replace Black/Yellow Printhead
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Figure : Streaked cyan or magenta color blocks - replace Cyan/Magenta Printhead
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note:The product shown in the video is the Officejet Pro L7780. The outside of the product might look different, but the steps are similar for your product.
caution:Do not proceed until the carriage is on the left. If the carriage does not move to the left automatically, turn the printer off and back on and then try holding down the OK button again.
caution:Do not shake printheads after the caps are removed.
note:Keep a print sample that shows the problem. If the ink cartridges, printhead, or printer is replaced under warranty, the support agent will request the print sample. If the printer is returned to HP, the print sample must be returned with the printer. Place the sample in the output tray when you package your printer for shipping.