Select Optimize for: in the Paper tab of your printer driver,
and choose the media that you are using. This feature is also
available in HP LaserJet Device Configuration. See

Accessing the online help

●

Plug the printer directly into an AC outlet instead of into a
power strip.

Vertical repetitive defects

●

The toner cartridge might be damaged. If a repetitive mark
occurs at the same spot on the page, install a new HP toner
cartridge. See

Changing the toner cartridge

for instructions.

●

The internal parts might have toner on them. See

Cleaning

the printer

for more information. If the defects occur on the

back of the page, the problem will probably correct itself after
a few more printed pages.

●

Select Optimize for: in the Paper tab of your printer driver,
and choose the media that you are using. This feature is also
available in HP LaserJet Device Configuration. See

Accessing the online help

Misformed characters

●

If characters are improperly formed, producing hollow
images, the media stock might be too slick. Try a different
media. See

Printer media specifications

for more information.

●

If characters are improperly formed, producing a wavy effect,
the printer might need service. Print a configuration page. If
the characters are improperly formed, contact an
HP-authorized dealer or service representative. See

Service

and support

for more information.