HP Photosmart 5520 Black Ink Problem

This video is a how-to for the issue of black no longer prints even though there's plenty of black ink. This will work for color too, but the black ink seems to be more of an issue. I tried getting this printer working for about 7 hours and finally got it working! If I knew this, it would have taken about 10 minutes! Good luck and thanks for watching! Here is the link for my video on how I got the ink stains out of my office rug: https://youtu.be/ledZ48epgb0