Before a cartridge installation please turn off its protection in following location, otherway a cartridge will be blocked and next regeneration won`t be possible (cartridge will be unusable). #13#10 #13#10 Button Start (Windows) › all programs › HP › the name of printer series › printer type › pritner conservation or estimated ink level › HP inks cartridge protection #13#10 #13#10 The location may be different in different models.
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