![Print Quality Problem - White lines down tha page](/g/b/img/faqend/faq00000213_034/in/en/21821/WhiteLine_VR.jpg)
Check the following points to resolve the issue:
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Make sure foreign material such as a torn piece of paper, sticky notes or dust is not inside the machine and around the toner cartridge and drum unit.
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The drum unit may be damaged. Replace the drum unit with a new drum unit.
> Click here to see how to replace the drum unit.