HP LaserJet 4250 - Manual (Page 192)

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