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94 Chapter 4 Problem Solving
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Vertical Lines
If black or white vertical streaks appear on the page:
The photosensitive drum inside the toner cartridge has probably
been scratched. Install a new HP toner cartridge.
Gray Background
If the amount of background toner shading becomes unacceptable,
the procedures described below may help to clear the condition:
Decrease the density setting. This will decrease the amount of
background shading.
Change the paper to a lighter basis weight. See “Media
Specifications” on page 139.
Check the printer’s environment; very dry (low humidity)
conditions can increase the amount of background shading.
Install a new HP toner cartridge.
Toner Smear
If toner smears appear on the leading edge of the paper, the
paper guides are dirty. See “Internal Cleaning Procedure” on
page 75.
A combination of faded and smeared defects may indicate that
the cartridge needs cleaning. See “Toner Cartridge Cleaning” on
page 73.
Check the paper type and quality. See “Media Specifications” on
page 139.
Try installing a new HP toner cartridge.
Loose Toner
Clean the inside of the printer. See “Internal Cleaning Procedure”
on page 75.
Check the paper type and quality. See “Media Specifications” on
page 139.
Try installing a new HP toner cartridge.