HP 2100 TN - Manual (Page 105)

EN Chapter 4 Problem Solving 93
Light Print or Fade
If a vertical white streak or faded area appears on the page:
The toner supply is low. You may be able to temporarily extend
the toner cartridge life. See “Redistributing the Toner” on page 71.
If this does not improve the print quality, install a new HP toner
cartridge.
The paper may not meet HP’s paper specifications (for example,
the paper is too moist or too rough). See “Media Specifications”
on page 139.
If the whole page is light, the print density adjustment is too light
or EconoMode may be on. Adjust the print density and
EconoMode within the software driver. See “Using EconoMode”
on page 56.
A combination of faded and smeared defects may indicate that
the cartridge needs cleaning. See “Toner Cartridge Cleaning” on
page 73.
Toner Specks
The paper may not meet HP’s paper specifications (for example,
the paper is too moist or too rough). See “Media Specifications”
on page 139.
The transfer roller may be dirty. See “Internal Cleaning
Procedure” on page 75.
The paper path may need cleaning. See “Engine Cleaning” on
page 73.
Dropouts
If faded areas, generally rounded, occur randomly on the page:
A single sheet of paper may be defective. Try reprinting the job.
The moisture content of the paper is uneven or the paper has
moist spots on its surface. Try paper from a different source. See
“Media Specifications” on page 139.
The paper lot is bad. The manufacturing processes can cause
some areas to reject toner. Try a different kind or brand of paper.
See “Media Specifications” on page 139.
The toner cartridge may be defective. See “Vertical Repetitive
Defects” on page 95.
If these steps do not correct the problem, contact an HP-
authorized dealer or service representative.