HP 4240n HP LaserJet 4250/4350 Series - User Guide - Page 192

Vertical white lines, Tire tracks, White spots on black, Q5942A or 20, 000 Q5942X s. For example

Page 192 highlights

6. If envelopes are creasing, try storing envelopes so that they lie flat. Vertical white lines 1. Print a few more pages to see if the problem corrects itself. 2. Make sure that the type and quality of the paper you are using meet HP specifications. (See Paper specifications.) 3. Replace the print cartridge. Tire tracks AaBbCc AaBbCc AaBbCc AaBbCc AaBbCc This defect typically occurs when the print cartridge has far exceeded its rated life of 10,000 (Q5942A) or 20,000 (Q5942X) pages. For example, if you are printing a very large quantity of pages with very little toner coverage. 1. Replace the print cartridge. 2. Reduce the number of pages that you print with very low toner coverage. White spots on black 1. Print a few more pages to see if the problem corrects itself. 2. Make sure that the type and quality of the paper you are using meet HP specifications. (See Paper specifications.) 3. Make sure that the environmental specifications for the printer are being met. (See Operating environment.) 4. Replace the print cartridge. 180 Chapter 4 Problem solving ENWW

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6.
If envelopes are creasing, try storing envelopes so that they lie flat.
Vertical white lines
1.
Print a few more pages to see if the problem corrects itself.
2.
Make sure that the type and quality of the paper you are using meet HP specifications.
(See
Paper
specifications
.)
3.
Replace the print cartridge.
Tire tracks
A
A
A
A
A
B
B
B
B
B
C
C
C
C
C
a
a
a
a
a
c
c
c
c
c
b
b
b
b
b
This defect typically occurs when the print cartridge has far exceeded its rated life of 10,000
(Q5942A) or 20,000 (Q5942X) pages. For example, if you are printing a very large quantity
of pages with very little toner coverage.
1.
Replace the print cartridge.
2.
Reduce the number of pages that you print with very low toner coverage.
White spots on black
1.
Print a few more pages to see if the problem corrects itself.
2.
Make sure that the type and quality of the paper you are using meet HP specifications.
(See
Paper
specifications
.)
3.
Make sure that the environmental specifications for the printer are being met. (See
Operating
environment
.)
4.
Replace the print cartridge.
180
Chapter 4
Problem solving
ENWW