Splinter , the new HP are now the same as Epsons . To override the thing you have to buy a second cartridge . Put it in the printer . This re-sets the memory in the printer . Now Your original one
re-filled will now work also . It is a cheesy method Epson and now HP are using to force you to buy their extra cartriges instead of refilling your old one . When the cartrige is first put in the printer there is a small program that reconizes a code containing the number of that individual cartridge . Replacing it with a new cartridge cancels the first code as it now recognises the second one . So now the first cartridge looks new to the printer and can be re-used . At walmart and other commercial re printers they have a cheater program to by pass the system allowing all of their refills to work .