HP Deskjet 6988dt Printer - Manual (Page 141)

Print quality is poor
Streaks and missing lines
If the 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. For the correct
part numbers, see the reference guide that came with the printer.
● Verify that a black print cartridge is installed.
If the black text and images on the 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 Remove 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.
1 Remove plastic tape
● The print cartridges might be out of ink . Replace one or both empty print cartridges.
User's guide 139