Printer not printing

[Vibs31]

Hello, 

My printer is printing blank pages. I realized ink were empty so instead of replacing all colored inks I replaced blank ink as I need only black and white document. Now it is showing full black cartridge but still when I try to print using black ink only I am getting blank pages.  What could be the problem? Thanks

[Bob_Headrick]

The troubleshooting steps in the document here may help resolve black not printing on your Photosmart 6520.

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.

[Vibs31]

Thank you. I replaced other inks also and it is working fine. I did not know that even if one ink is out , it will not even print in black and white.