shooting
FRU Action
Button keypad
If the touchscreen is ok, POR into Diagnostic mode, and perform
the Button test under the Hardware tests. If the buttons do not
respond, then replace the keyboard.
6.5.12 PAPER FEED SERVICE CHECKS
Paper jam error indication during POST
FRU Action
Fuser (exit sensor)
If the exit sensor flag, which is visible at the back of the fuser, is in
any position other than vertical, then the machine will display a
paper jam. Make sure the flag is operating freely.
Replace the fuser if the sensor is damaged.
Input/duplex sensor
Manual feed sensor
Make sure the input paper feed sensors are working properly. A
stuck or incorrectly installed sensor causes a paper jam indication.