HP Q7829A HP LaserJet M5025/M5035 MFP - User Guide - Page 229
Vertical white lines, Tire tracks, White spots on black
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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 media you are using meet HP specifications. See Media and trays. 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. 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 media you are using meet HP specifications. See Media and trays. 3. Make sure that the environmental specifications for the device are being met. See Operating environment. 4. Replace the print cartridge. ENWW Solve print-quality problems 217