Read the post to understand the way to fix hp printer problems with Windows OS. you'll solve printer stops working or printer not printing, etc issues. If your printer starts printing but the HP printer not printing color or the printed page missing black color. Then dont panic you'll fix it. you would like to exchange the cartridge and use only genuine hp color cartridges. Otherwise, you'll remove black cartridge form the hp printer and may use only tri-color and clean the printer heads. If you need urgent print copy then you'll use the hp printer in backup mode.