Okay, your probably not this stupid but when i first got my printer (photo R200) all cartiridges were fine with ones it came with.
I then brought some immitation ones because I cannot afford 60quid every time I run out. So i replaced all the catridges and went to strart printing. Nothing comes out the catridges
Took me ages to figure out that i hadn't removed the little tags on the top of the cartridges that cover the air hole. Without these removed no ink can get out! Stupid me didnt read the intstructions when replacing! OPPS
That might be of some help
PM