black will not print on quality diagnostics page

[markeymark48]

tried to print a page and no black ink. I changed to new black cartridge and ran diagnostics page and 3 colors look fine, but black is missing (all white box). I retrieved the old black cartridge and reinstalled it, thinking the new one was defective, no luck. reinstalled new one. turned printer off and then on, no luck

ran clean cartridges and no luck. On the "print quality diagnostics" page i ran, the black text showing instructions is fine. just no black in the box.

when i run a test document which is all black ink, nothing prints out, just blank page

[Bob_Headrick]

The troubleshooting steps in the document here may help resolve black not printing on your Photosmart 5520. 

Note that the text printed in certain diagnostic and support pages uses a mixture of black and color inks so the information can be read even if black or one or more colors are not printing properly.  You can simulate this by selecting Photo paper as the paper type, this would force the color ink to be used even for black text.

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.