Canon PIXMA MG4200 Series On-Screen Manual page 132

Note
If the error message appears after the paper output cover is closed, take appropriate action.
An Error Message Is Displayed on the LCD
When you start printing after replacing the FINE cartridge, the machine starts cleaning the print
head automatically. Do not perform any other operations until the machine completes the
cleaning of the print head.
If the print head is out of alignment, as indicated by misaligned printed ruled lines or similar
symptoms, adjust the print head position.
Aligning the Print Head
The machine may make noise during operation.
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