Hi Guys
I stumbled onto this thread as i don't own this box and maybe try my method that i use on a USB TV Dongle to turn it on.
It should work. Advice on AMlogic "TV stick/dongle" hardware
Will try to hook it up to TV, Receiver, will keep you posted.
Update: tested usb power from Tv and Receiver, no luck, guess the pro plus version requires indeed more juice