![White lines, bands or ribbing across the page](/g/b/img/faqend/faq00000211_028/us/en/24744/01_bandacross.gif)
Please check the following points to solve the problem:
- The drum unit or toner cartridges may not be installed correctly. Re-install the drum unit and toner cartridges.
- The drum unit may be damaged. Put in a new drum unit as follows:
- Click here to print the chart. [185KB/ PDF]
- Compare your printed document with the printed chart to identify the color of the drum unit causing the problem.
- Replace the drum unit of the color. Click here to see the details of how to replace the drum unit.