If your printer is not working, make sure you have used a genuine ink cartridge. HP gives guarantee only for Genuine HP cartridges. Use a proper sheet for printing. Ensure that the paper is of good quality. For printing, either select print from file option or press ctrl+p. Ensure the settings are correct in the window that pops up. Make sure the drivers installed are up-to-date. There could be problems if the driver or the software is crashed. So, make sure the drivers are proper. If, you are printing an image make sure the quality of the image is high. For more details realted to HP Officejet Pro Printing Problems just call our customer support team number +1-800-237-0201.