There is a mistake in the AudioVision 14 Display manual. Both the Centris 610 and Centris/Quadra 660AV have a pass through power supply. This means that as long as the Centris is plugged in to the wall outlet and the monitor is plugged in to the Centris, there will be power to the monitor.
The only way to turn the monitor off is via the power switch on the monitor itself.