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Your laser printer frequently creates photos with white streaks going down the page. What can you do first to fix this problem?

A Gently shake or replace the toner cartridge.

Vertical white lines running down the page are most usually caused by clogged toner that is unable to transfer correctly to the drum. This is a common issue when the humidity of the surrounding air is too high. To begin, remove the toner cartridge and gently shake it to loosen the toner. If that doesn't work, you may need to change the toner cartridge.

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