Black ink fails to print suddenly after replacing all cartridges
Product: Photosmart 6520
After replacing all colors on my HP Photosmart 6520 printer, my black ink fails to print. after cleaning, aligning etc, no change in this status. This came about suddenly and it does not matter whether I change from color to black and white.
I realize the printer is old but after just spending $80 on ink, it is totally upsetting. You can just barely see a shadow of print on some attempts I made to print.