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WD TV models WDAVN00, WDAVP00 (aka generation 1) is old models - and USB power is not off if device power off from remote control.
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WD TV models WDBABF0000NBK, WDBABG0000NBK (aka Generation2) is new models - and USB power is off if device power off from remote control.
I am russian and my english is bad too.