Specifications

Troubleshooting Service Test Page - 22
Cover the toner cartridge with a piece of paper to prevent
exposure of the drum.
Press down on the toner cartridge and the cover interlock actuator
while you press the service test page button with a screwdriver
(or similar dowel-shaped tool).
Note: When you press down the cover interlock actuator, the fan
should come on and the paper delivery rollers should rotate. If
you don't hear the fan, verify that you have properly defeated the
paper delivery sensor PS301, that you are holding down the cover
interlock actuator all the way, and that the paper cassette is
installed. If you do not press down firmly on the toner cartridge
during the printing process, the test page may be blank.