If your HP Printer Not Printing Black, check to make sure that the printer is turned on and connected to your computer. Then, take a look at the ink cartridges to see if they need to be replaced. If they do, install new ones and try printing again. There may be a problem with the settings if the issue is still there. Check the printer's settings to make sure that it is configured to print in black. If not, change the settings and try printing again.