Kingjet NON-OEM Replacement Ink Cartridges for HP 973X 973Compatible Printers: HP PageWide 452DWHP PageWide 452DNHP PageWide 452DWTHP PageWide 477DWHP PageWide 477DNHP PageWide 477DWTHP PageWide 552DWHP PageWide 577DWHP PageWide 577ZUser Instruction: 1. Please inspect the cartridges in good condition and confirm your printer model firstly. 2. Please tear off the tape which marked "PULL" before installing the cartridges. 3. Then insert the cartridges into printer and click "yes" if the printer shows a message "NON-Genuine" or try to reinstall them several times if it shows "the cartridge cannot be recognized" or any other wrong messages. Warm tips:1. Please do not touch or scratch the chips.2. To improve the printing quality, it is better to clean the printhead (in Printer Properties) once or twice before printing the files with a cartridge. Contact us: Sign in your account, find your "Kingjet order" and click contact seller, then contact us by E-mail and we will give you a prompt reply within 24 hours.
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