I changed the ink but it won't print

Hi Sharon, if your HP printer is still unable to print after recycling the Ink Cartridges, it's most possible due to improper alignment of it.

Try these steps:

Open HP print manager -->> Select setting and maintenance -->> Select align print cartridges

Now take out printed paper, you will see two dot lines parallel in red and black. Examine the alignment of the lines, click the numbers and letters for the best alignment, a dialogue box will appear to your screen, click continue, a new page will be print, now check whether these alignments are correctly printed on the paper, if you found irregularity over alignments, repeat this step 3 or 4 times to continue.

h/t: How to Set-up Print Cartridges to the HP Printers?

i changed the ink and now the printer isn't working right

إمبارح عملت نعم بل فعل