Dell Phot 924 printer not printing in colour
I have a Dell Photo 924 all in one printer. Each time I try to change the cartridges it does not seem to recognise that the colour cartridge has been changed and continues to tell me that ink is low and does not print colour very well. I have bought 3 colour cartridges and each time it still does not think a new cartridge has been installed. The black one is okay and the ink levels are recognised as full when I change this one. Any ideas? Does the printer need a clean or do you think I have a major problem??