Video Off and Display Off modes
One potential concern with so many types of circuitry in one chassis is
mutual interference. Sony minimizes the possibility of radiated interference with
power-off configurations that shut down potential sources of noise:
Video Off: Shuts down the video circuitry and the HDMI™ output to
eliminate even slight residual effects on the audio circuitry.
Display Off: Disables the display for a further reduction in noise.
ES DVD Players 2005, Version 4.0
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