When I loaded the new 564XL black ink into my printer it did not work. Then I tried the other Xl ink that I bought together and this did not work either. I researched the issue online and someone said they resolved this problem by using a regular 564 and it worked. So I went out and brought a 564 black ink, loaded it and it worked. Now I have two opened 564XL cartridges.
Thanks ink arrived on time entire purchase from start to finish was seamless great product from HP as usual. Never buy knockoff ink nothing but problems I know from experience.