Using the Print Cartridge Cleaning Routine
When dots or lines are missing from printouts, use the following routine to clear the print cartridge ink nozzles. The HP DeskJet 400 printer can clean either a black or a color print cartridge.
1.Hold the change cartridge button while pressing the power button.
2.If you are using manual feed, insert a sheet of Letter- or A4- size paper in the paper feed slot.
LTR
A4
B5
3.The printer will perform a series of “spits and wipes” on the print cartridge nozzles. If you are using a black print cartridge, the printer will then print a page like the one shown:
4.If you are using a color print cartridge, the printer will then print a different page, like the one shown below:
If there are streaks in the horizontal bars or gaps in the diagonal test pattern at the bottom of the page, some of the ink nozzles may still be clogged. If necessary, repeat the cleaning process. If the cleaning routine still does not restore the print cartridge, try doing the procedure “Cleaning the Electrical Contacts” later in this chapter.
