HP LaserJet Enterprise MFP M634, M635, M636 - User Guide

Resolving mono print quality problems
Introduction
Use the information below to troubleshoot print-quality and image-quality problems on mono (black and
white) HP LaserJet Enterprise printers.
The troubleshooting steps can help resolve the following defects:
● Blank pages
● Black pages
● Curled paper
● Dark or light bands
● Dark or light streaks
● Fuzzy print
● Gray background or dark print
● Light print
● Loose toner
● Missing toner
● Scattered dots of toner
● Skewed images
● Smears
● Streaks
Troubleshoot print quality
To resolve print-quality issues, try these steps in the order presented.
To troubleshoot specic image defects, see Troubleshoot Image Defects.
Update the printer rmware
Try updating the printer rmware. For more information, go to www.hp.com/support and select the option to
Get software and drivers. Then follow the prompts to navigate to the rmware download for the printer.
Print from a dierent software program
Try printing from a dierent software program. If the page prints correctly, the problem is with the software
program from which you were printing.
Check the paper-type setting for the print job
Check the paper type setting when printing from a software program and the printed pages have smears, fuzzy
or dark print, curled paper, scattered dots of toner, loose toner, or small areas of missing toner.
ENWW Resolving mono print quality problems 203