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Is the sound the printer makes when it
starts working normal?
Yes, when the printer functions properly, a sound
occurs when you turn the printer on and also when it
picks up paper.
Which print cartridges can I use with the
printer?
Use one of the following inkjet print cartridges:
Tri-Color HP51625A (supplied with printer)
Large Black HP51626A (optional)
Black HP51626G (optional)
How do I print in color using Microsoft
Windows software?
Use the HP color inkjet print cartridge (HP51625A) for
color printing and the HP large black (HP51626A) or
black (HP51626G) for black printing. If you print a
color document in black, remember to check the
Print in Grayscale setting in the Printer Setup
menu. (See page 5, “Finding the HP Printer Setup
Box.”)
How can I get the best print quality?
To ensure the highest print quality from the HP
DeskJet 420 series printer, use original HP inkjet
print cartridges together with HP’s Premium InkJet
Paper or Bright White InkJet Paper.
The HP printer software gives you optimal results
when you select the Best printing setting in the
Printer Setup menu. (See page 5, “Finding the HP
Printer Setup Box.”)
How do I print envelopes, labels, or thick
paper (heavier than 24 lb)?
You must feed envelopes, labels, and thick paper one
sheet at a time from the back of the printer. Be sure
that you have selected
Manual Feed
and the
appropriate
Paper Size
in the
Printer Setup
menu.
Then open the printer door and switch the envelope
lever to Envelope
()
. Close the printer door and
print one page.
What do I do if I get a paper jam?
To clear the paper jam:
1. Turn off the printer.
2. Remove the paper from the paper tray.
3. Remove the printer door by grasping it by
its sides, then pulling the door toward you.
4. Carefully pull the paper out of the printer.
See page 11, “When Paper is Jammed in the Printer” for
step-by-step illustrations. To avoid paper jams, be
sure to set the paper size lever to the correct setting
and to move the paper width guide so that it presses
lightly against the paper stack. Also, be sure to feed
paper that is heavier or lighter than 16 to 24 lb from
the back of the printer manually.
When the Printer Does Not Print
The printer shows no response at all to the print
command.
■ The printer is not properly connected to the
power source. Make sure the printer’s power
adapter is firmly plugged into the printer and
into the wall power outlet.
■ The printer is off. Press the Power button ( )
until the Power LED lights up.
■ The printer is not properly connected to the
computer. Make sure the interface cable is
firmly connected to the parallel port of the
printer and the computer.
■ You may be using a wrong parallel cable or
the parallel cable may be defective. Use
either of the following parallel cables:
HP part no. C2950A or C2951A.
■ Your printer is not selected as the current or
default printer. Select your printer using the
Printer Setup menu in your software
program. Alternatively, set your printer as the
default from Printers in the Control Panel.
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