I don't have one but if you watch Andrew at around 4:30 he discusses how the power switch works and it's definitely on without any signal cables.

https://m.youtube.com/watch?feature=youtu.be&v=c6fVNedgny4
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A-LFR/1000-8/500v4x2 coming
1000-2,3,1500-3
100,160,QS10x2,800,M5,M3,M50 v4
had v2
Air N2 (someday)