Hello, I am Nikita Kumari. I am digital marketing specialist and freelancer. If your HP printer is connected and powered on but still Hp printer not printing, there are several steps to resolve the issue. First, ensure that there's sufficient paper in the tray and that it's properly loaded. Check for any paper jams or obstructions that may be hindering the printing process. Next, confirm that the ink or toner cartridges are adequately filled and correctly installed. Run a printer self-test to identify any internal issues. Additionally, update or reinstall the printer drivers and software on your computer.