Is it possible, to turn off the HDMI video component? My Pi operates headless so there ist no need for me to have a video out component. If yes, how much power will be saved?
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2You can save more power by disabling the usb-controller. – Gerben May 13 '14 at 15:43
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I think you can just switch it off, but I do not know how much power is saved.
Switch off
/opt/vc/bin/tvservice -o
Switch on
/opt/vc/bin/tvservice -p
HeatfanJohn
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