I believe that if you peek on the inside of parts that show warnings no to, light enters, and this light will sensitize the drum which will attract toner and print (as smudges). The cartridge will have to be reconditioned. Karl _________________________________________________ For information concerning the MUGLO List just click on http://www.freewebs.com/muglo/joinus.html Our Archives can be viewed at //www.freelists.org/archives/muglo Don't forget to periodically check our web site at: http://www.freewebs.com/muglo/