1. Is it an original HP color cartridge or a third party?
2. Why did you buy a new one. Was the old one empty (as far as you could see) or did it give some error you thought would be remedied by a new one?
3. What's in the user manual about flashing color cartridge lights?
I just bought a brand new color cartridge for my HP Deskjet 9800. It isn't working and the red color cartridge light keeps flashing. Any help I could receive would be greatly appreciated! Thanks. Patricia