try this:
open the cover, and then the other cover where the pump is, find which hose is for the black and cyan is coming from the cap top, remove and attach a syringe and pull, until you see the ink, it will be mixed with black, but it will get trough the head, remove the syringe again and try again if you do not see the ink, (what I do is attach the syringe and pull, if no ink comes I use my mouth, slowly of course until you see the ink, but if you suck only air, the captop and the head is not aligned, you will feel resistance when sucking with your mout) hope this helps........................