What should you do when performing the stapler/stacker test on the 3000-sheet
stapler/stacker on the LaserJet 9000? Select TWO.

A.
override the interlock switch on the device (press and hold it)

B.
tape off the photo-interrupters

C.
slide the service mode switch on the controller PCB of the device to the ‘Off position

D.
turn off the printer before performing this test and disconnect the device from the
printer