The printer has an error. The door is open, the media is out, the toner cartridge is installed incorrectly, or the paper is jammed.
1. Check that the toner cartridge door is
completely closed.
2. Load media into the correct input tray.
3. Check that the toner cartridge is correctly installed in the printer. (See
“Toner cartridge” on page 78 for more information.)
4. There is a paper jam. (See “Functional checks” on page 149 for more
information.)
5. Check that the door and toner cartridge interlocks are operating
correctly. (See "Paper path check" on page 155 for more information about the
door interlock.
For the Service Manual go to this site. http://image1products.com/techdocs.new/