You know those HP cartridges come with pre-paid UPS labels so that you can send that cartridge back to get refilled/recycled. I vote leave him there....box him up and send him back to HP to scare the crap out of the person that processes the returned cartridges...enclose a note saying you only used the cartridge twice then it stopped working...you can't figure out what is wrong, but expect a replacement to be mailed ASAP.