How can I tell which ink cartridge needs to be replaced?

• Check the LCD display codes on the printer to see which cartridge is low or empty.
  
  ILc = Color Low
  
  ILb = Black Low
  
  IEc = Color Empty
  
  IEb = Black Empty
  
  If you're printing from your computer, you'll see a message telling you which cartridge is low or empty. Click the 'How to' button to see instructions for replacing the cartridge.