Warn anyone on stage before that all lights may be turned off (blackout).
From the Select
task, press the Release button 
to the right
of the touch screen until “Release all active Cues and Memories?”
appears on screen. Press 
.
Ensure all lights/memories are off by placing the twenty sliders across the top of the console are at the bottom of their travel. (see Setup|System|Sliders always run memories)
Set the four sliders at the bottom of the console (two on either side) are at the top of their travel. These are the Grand Master, the Memory Master and the Left and Right Playback Masters.
Select one light (any light) and press 
Info Screen then
press Locks and see if any
lights are locked that shouldn't be. Press to leave
this screen.
Release
to release the lights.