HP 11 Printheads marked with Warranty Ends dates in the ranges indicated below might fail on installation, resulting in a printhead error message.
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Printhead
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Affected date range (YYYYMMDD format)
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HP 11 Cyan, Magenta, Yellow (C4811A, C4812A, C4813A)
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March 2020 and later (marked 20200301 and later in YYYYMMDD format)
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HP 11 Black (C4810A)
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April 2020 and later (marked 20200401 and later in YYYYMMDD format)
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The Warranty Ends date is printed on the printhead packaging and on the printhead itself in the locations shown in the picture.
