First and foremost, make sure that you stack the paper in the input tray. Next, install HP DeskJet 3512 ink cartridge and remove all the tape and packing materials from the printer device. Now, keep your printer on the flat surface and then connect one end of the cord to the back end of the printer, and the other end should be connected to the power outlet. Then, you need to open the paper input tray and adjust the HP DeskJet 3512 Ink and place the load of 10-20 sheets of paper and adjust the paper width guide until it gets adjusted with the paper. Then, gently remove the tape to get the ink cartridge out of the paper package. Now, lift the ink cartridge door and place the HP DeskJet 3512 ink cartridge in the respective slots. Close the cartridge access door, and place the alignment page at the right-front corner of the scanner glass. Lastly, press the Start copy black button in order to align the cartridges.