I have replaced the ink carts. and have unplugged the power for sixty secs. trying to reset it but it will not. I am running 32 bit ubuntu 12.04, using the hplip driver. It has the Blue ink light flashing and I have replaced the cart. with a new one. it printed for 15 sheets of paqper and it paused. I've only had the printer for 6 weeks but have plugged into an eight port router.