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HL-4000CN
FAQs & Troubleshooting
Dirty spots are printed.
Check the following points:
Is the media suitable and are you using preprinted or inkjet paper? Replace the media with a recommend size and type, and confirm that your printer driver settings are correct.
The print head cartridge might be old or damaged. Replace the print head cartridge.
To see how to replace the print head cartridge, click here
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