Printronic 4 Pack Remanufactured HP 61XL Ink Cartridge for HP Envy 4500 5530 Deskjet 2540 1510 2050 3050 OfficeJet 4630 Printers (2 Black 2 Color) Supported printers: HP Deskjet 3516 HP ENVY 4500 HP ENVY 4501 HP ENVY 4502 HP ENVY 4503 HP ENVY 4504 HP ENVY 4505 HP ENVY 5530 HP ENVY 5531 HP ENVY 5535 HP OfficeJet 2620 HP OfficeJet 4630 HP OfficeJet 4632 HP OfficeJet 4634 HP OfficeJet 4635 Supported printers: HP Deskjet 2541 HP Deskjet 2542 HP Deskjet 2543 HP Deskjet 2544 HP Deskjet 3000 HP Deskjet 3050 HP Deskjet 3050A HP Deskjet 3051A HP Deskjet 3052A HP Deskjet 3054 HP Deskjet 3056A HP Deskjet 3510 HP Deskjet 3511 HP Deskjet 3512 The cartridge contacts are not making a firm connecting with the printer contacts. This happens if the customer has not installed the cartridges properly or if the cartridge contacts or printer contacts are dirty. Tell the customer to make sure that both of the contact points are clean and that the cartridge is installed firmly. Supported printers: HP Deskjet 1000 HP Deskjet 1010 HP Deskjet 1050 HP Deskjet 1051 HP Deskjet 1055 HP Deskjet 1056 HP Deskjet 1510 HP Deskjet 1512 HP Deskjet 2050 HP Deskjet 2510 HP Deskjet 2512 HP Deskjet 2514 HP Deskjet 2540 Remove the cartridges out of the printer and shut printer off. Unplug printer from the power outlet and your computer as well. Turn off your computer as well (if you are able to). Wait a few minutes before turning on your printer. Plug in the printer to the outlet and to your computer as well. Turn your printer on and wait until it starts up. Install the printer cartridges, and if alignment page does not print out automatically, try doing it manually. The reset of the printer should allow the printer to read the new cartridge.