Lexmark C3326 Laser Printer - not working - for parts/repair (Slough central SL1)

This Lexmark C3326 colour laser printer was a work horse until it suddently stopped recognising the fact that the black ink cartridge was in place. It is throwing an error saying it can't see the cartridge. If someone is able to repair this, or wants to use the printer for parts, they are welcome to take it along with all the ink catridges. I would prefer this over sending it to the tip.