Problem Cause Solution
Marks repeatedly appear at even
intervals on the printed side of the page.
A print cartridge might have a problem. To determine which cartridge has a
problem, print the PQ diagnostics page
from HP ToolboxFX.
Internal parts might have toner on them. The problem typically corrects itself
after a few more pages.
The paper path might need cleaning. Clean the MFP through HP ToolboxFX.
The fuser might be damaged or dirty. Clean the MFP through HP ToolboxFX.
Replace the fuser. See Replacing the
fuser assembly.
Marks repeatedly appear at even
intervals on the unprinted side of the
page.
Internal parts might have toner on them. The problem typically corrects itself
after a few more pages.
The paper path might need cleaning. Clean the MFP through HP ToolboxFX.
The fuser might be damaged or dirty. Clean the MFP through HP ToolboxFX.
Replace the fuser. See Replacing the
fuser assembly.
The printed page contains misformed
characters.
The media might not meet HP
specifications.
Use a different paper, such as high-
quality paper that is intended for color
laser MFPs.
If characters are incorrectly formed so
that they produce a wavy effect, the
laser scanner might need service.
Verify that the problem also occurs on
the Configuration page. If so, replace
the whole MFP.
The printed page is curled or wavy.
The MFP is not set to print on the type
of media on which you want to print.
In the printer driver, select the Paper
tab and set Type is to match the type
of paper on which you want to print.
Print speed might be slower when
using heavy paper.
The media might not meet HP
specifications.
Use a different paper, such as high-
quality paper that is intended for color
laser MFPs.
Both high temperature and humidity
can cause paper curl.
Check the MFP environment.
ENWW Print problems 129
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