If the black ink goes out of stock, then this would be the actual reason behind HP Printer Not Printing Black. In order to efficiently rectify this issue, you need to install the black ink cartridge appropriately and then start performing print job. In case you yet not receiving printouts in black color, then it means printer nozzles are clogged. It is required to clean the print head nozzles first and then try printing. This time printer may start printing black and producing quality print in no time.