If you copy something on the scan that has black and it prints it fine its a software issue. If it don't then the print head may have dried up. I recommend replacing the print head. You can wet down a paper towel with rubbing alcohol and dab the print head and see if you can get the ink flowing again it worked on mine. I also found if you leave it turned on so that it can run a cleaning cycle once in awile this can be avoided. Hope this helps. Copied from this website...
http://www.fixya.com/support/t1499908-kodak_esp_3_printer_print_black