Lexmark z23 cartridge banging

Unfortunately, this is a known problem with Lexmark printers.
First, try turning the printer upside down and shaking it - it's been known to work. If it didn't help, try cleaning the parts with alcohol solution. Wipe everything inside including the top strip, the metal bar and then pull the ink cartriges out and wipe the copper and the actual cartrige too. And to finish it, hit the side of the printer a couple of times.