HP Deskjet 6840 Color Inkjet Printer - Manual (Page 148)

• Move the printer away from direct sunlight. The printer may have been placed
in direct sunlight, which can affect the Automatic Paper-Type Sensor .
• Select a paper type other than Automatic.
• If you are performing a
color calibration , install both the tri-color and photo print
cartridges .
• If you are printing a borderless document and the Resume light and Print
Cartridge Status light are flashing, follow the borderless printing guidelines .
Other paper problems
• For information about clearing a paper jam, see the paper jam page.
• If an out-of-paper message appears, see the error messages page.
11.6 Print quality is poor
For help with photo print quality, see the photo troubleshooting page.
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.
HP Deskjet 6800 series printer
148