Only the green  power light is on, but nothing prints. What should I do?

• The problem could be due to a cabling issue, a software setting or the printer's condition. See more information.
  
  Note: In the course of troubleshooting this problem, you may try cleaning the print head. When you are using the print head cleaning utility for Mac OS 8.6 to 9.x, you must click the Close button when you see the screen below.