HP 400 - Manual (Page 87)

5-24 Problem Resolution
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.
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.
LT R
A4
B5