Documents are printed in monochrome
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Check 1 Is Color Mode set to Monochrome in the printer driver?
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For Windows
In the Advanced Settings of the printer driver, specify Color in Color Mode and try printing again.
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For macOS
In the Quality & Media of the printer driver, specify Color in Color Mode and try printing again.
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Check 2 The print head nozzle may be blocked.
Print a test pattern to check the color ink nozzles and see if they are clogged.