Printing ink

[maggie17]

I changed the black ink (HP ink), but not the color ink (they were not completely empty, but almost). When printing I choose printing in black and white and it will not print. Do I have to change the color ink also? It won't print using the color option either. 

[Bob_Headrick]

When you say the printer will not print do you mean the printer goes through the motions of printing but the pages are blank, or that there is an error message like "the following cartridges are depleted" and printing is blocked?  If the latter the depleted cartridges will need to be replaced before printing.  

If the printer goes through the motions of printing but the pages are blank then the troubleshooting steps in the document here may help. 

If the standard troubleshooting did not resolve black not printing I would suggest removing the black cartridge.  Turn it over and examine the area around the ink port.  There are four orange plastic spots, left over from the protective cap.  Make sure these are flush with the cartridge body, if not carefully trim them flush.  If the plastic nubs protrude they can prevent the cartridge from seating properly.  Before replacing the cartridge in the printer dribble a few (maybe four) drops of hot water into the ink port in the printer and two drops into the ink port on the cartridge then snap the cartridge back in position.  

It may also help to manually clean the printhead as described in the post here.

I have also seen cases where leaving the printer overnight after the cleaning cycles allows black to recover. 

If none of the above restores black printing your printer will likely require repair or replacement.