To install HP Deskjet 3630 ink cartridge, firstly Turn the printer on. You must check the ink levels of your HP DeskJet 3630 ink cartridge. The cartridge running low in ink levels needs to be taken out. You need to purchase a new compatible hp cartridge from an HP store. Remove the brand new ink cartridge from its package. You should now Insert the brand new cartridge by removing the plastic step. Hold the ink cartridge via its handles with the nozzles towards the printer. Insert the ink cartridge into its real slot. Finally, Press the ink cartridge ahead till it latches into place.