When your printer is out of ink, replace it with the new cartridge immediately. Running the printer on dry ink cartridges can be harmful. Here’s howto change ink cartridge Canon Pixma MG2920. After turning on, open the printer’s outer lid and print cartridge access door. Wait until the printer is in idle mode and the press down the old cartridge to get it released. Replace the new one in the slot. Make sure you do not touch the new ink cartridges. Close the lids of the printer and wait for test page to appear.