Table 13. Engine test troubleshooting 80 Chapter 3 - Troubleshooting Q1342-90910 Problem Cause Solution Engine test print page is filled with evenly spaced horizontal lines. Successful engine test. No action required. No engine test page prints. Various possible causes. See “Basic troubleshooting” on page 64, item 2. Print page comes out curled or wrinkled. Paper curl is inherent to the laser printing processes, and occurs when paper is subjected to heat. Paper curl tends to relax as the paper cools while resting on a flat surface. Make sure that the media meets specifications detailed in the Print Media Guide for the HP LaserJet printer family.
Paper is curled or wrinkled when using the paper output bin. Open the straight-through output door on the back of the printer and use this paper path. Reset the fuser mode to the default. Paper is not stored properly. Whenever possible, store paper in its sealed ream at room temperature. The fuser temperature is too high. Select Optimize for: in the Paper tab of the printer driver (software). Make sure that it is set for the appropriate media. Print is misaligned on the page (skewed pages). The input tray is overfilled. Remove some of the media. The paper guides are not set correctly, are broken, or are missing. Be sure to center the paper with the side media guides.
Verify that the guides are not adjusted too tightly or too loosely against the media stack. Check for broken or missing guides and replace as necessary. The media weight or surface finish does not meet HP’s specifications. Make sure that the media meets specifications detailed in the Print Media Guide for the HP LaserJet printer family.