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Please check the following points to solve the problem:
The toner cartridge may be damaged. Put in a new toner cartridge.
Please refer to the instructions, "REPLACE TONER".
The drum unit may be damaged. Put in a new drum unit.
Please refer to the instructions, "REPLACE DRUM".
Check if the Toner Settings of Replace Toner is Continue (Continue mode). To check the setting, press Menu, and choose General Setup => Replace Toner.
Make sure that a torn piece of paper is not stuck inside the machine blocking the scanner.
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