Lexmark C912 User Reference Manual page 133

3
Remove any jams.
4
Close the jam access door.
5
Slide the high capacity feeder until the feeder locks to the docking frame.
When the feeder is in the correct position, you hear a click.
6
Press .
Go
If the paper jam message continues, check and clear all paper from the paper path.
200 Paper Jam <x> Pages Jammed (Check Areas A-F, T1-5, MPF)
Clearing paper jams
128