If you are wondering how to reset HP Printer, then you should note that it is quite an easy process. To reset your printer to factory defaults, you should first, verify that your printer is turned on and then open the printer. Now, you should remove the cartridges from it and then unplug the power cord as well. After 15 minutes, you should plug in all the cables that you previously unplugged. Further, reinstall the cartridges and power on your printer. In the end, you should print a test page to see if it helps.