I ahve a HP Photosmart 1000 printer and its bene great fro 5 years! The cartridges are costly so we use compatible but cheaper cartridges. I have one from “Office Depot”. Yesterday the printer suddenly displayed this message: “Colour cartridge not compatible”. I turned it off and on again and it was fine. Now its doing the same thing but wont respond when i switch on and off. Any ideas? I need it urgently!!!!