So you need to replace a cartridge in your HP Printer? Let’s walk through the steps together. First, turn on the printer by pressing the Power button. Lift the cover of the printer. The carriage will slide into position. Now you’re ready to remove the old cartridge. Push the release tab inward to unlatch the cartridge and remove it from the carriage. To install the new cartridge, remove the plastic wrapping. Make sure that you use the orange pull tab to remove the plastic. It will properly expose the vent in the top of the cartridge. Next, remove the orange plastic cap from the cartridge. With the cartridge in one hand, and the orange cap in the other, twist the cap off using a good amount of force. Place the new cartridge into the slot and gently push down until it snaps into place. To ensure that each cartridge is in the correct spot, match the color and shape of the cartridge, to the corresponding color and shape on the print head. Once the new cartridges are in, close the top cover of the printer. Your printer is now ready to use.