I. Make sure the printer is off but is plugged in
II. Hold down [RESUME] (Triangle pointed down) and hold down [POWER]
and wait 5 seconds or so.
Release [RESUME] but Continue to hold [POWER]. Double click [RESUME].
then Release [POWER].
Press [RESUME], than [POWER]. This should cause the printer to print a
simple diagnostic that'll list it's ROM number and list CDR SENSOR=OK
in red for the last line.
Press [RESUME] twice then [POWER]] to print off the second diagnostic.
Press [POWER] by it self to exit service mode and return to being a
printer.
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