QMS CrownCopy User Manual page 23

9 If the printer boots up normally (IDLE appears in the mes-
sage window), return to step 3 on page 5 to finish installing
CrownCopy.
If the printer isn't operating properly when it's turned on, make
sure that the controller board is firmly seated in its connectors,
that no pins are bent between the new PROM and its socket, and
that the PROM is installed in the right direction.
L