HP 3840 manual Print quality is poor, Streaks and missing lines, Print is faded, Blank pages print

HP Deskjet 3840 series printer User's Guide

11.4 Print quality is poor

Streaks and missing lines

If your printed pages are missing lines or dots, or if streaks appear, the print cartridges might be low on ink or might need to be cleaned.

Print is faded

•Verify that neither of the print cartridges is low on ink.

If a print cartridge is low on ink, consider replacing the print cartridge when the print quality lessens.

If the print cartridge is not low on ink, clean the print cartridge.

•Verify that a black print cartridge is installed.

If the black text and images on your printouts are faded, you might be printing with only the tri-color print cartridge. Insert a black print cartridge, in addition to the tri-color print cartridge, for optimal black print quality.

•Verify that the protective piece of plastic tape has been removed from the print cartridges.

1.Plastic tape

•Consider selecting a higher print quality.

Blank pages print

•The protective piece of plastic tape might still be attached to the print cartridges. Verify that the plastic tape has been removed from the print cartridges.

•The print cartridges might be out of ink. Replace one or both empty print cartridges.

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