User`s guide

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

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.

LTR