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In a case like the one you describe, where discoloration or wrong colors occurs in an inkjet printer, you ought to do one or two Head Cleaning cycles, to wash away waste ink that may be corrupting the ink that gets through the printhead and onto the paper.
This is especially true, if you have had the printer Off for a period of time.
Head Cleaning is a function found in the Maintenance tasks/functions invoked either from the printer's own controls and menus, or from the Maintenance tab in the (Windows) printer's driver software.
Let me know how it goes, please. Thanks.