HP Photosmart 5510 is printing blank pages. It worked fine 2 weeks ago

[Debenny]

I only get blank pages when I print now. It was working 2 weeks ago last time I used the printer. Ink cartridges are HP and at 65 in terms of ink. I tried everything including hard wire. Nothing is working.

[Bob_Headrick]

The troubleshooting steps in the document here may help resolve black not printing on your Photosmart 5510.  Go through the steps in order,  Does anything print in the test page in Step 6?

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.