Apple ColorLaserWriter 12/600PS - Manual (Page 251)

Checking the indicator lights for paper jams
When paper is jammed somewhere in the printer, the Paper Jam light glows
orange, and lights on the status panel indicate the location of access doors
near the paper jam.
If you see other lights flashing, see Chapter 10 or Appendix G for
information about the status panel.
m If you have connected an external hard disk, make sure it’s turned on.
m Check the technical specifications of the hard disk to make sure it supplies
at least 5 volts of termination power.
M
!
C
Y
The lights on this diagram identify
the access doors nearest the paper jam. Paper Jam light
228 Chapter 11