The power button on the Rii remote can be programmed to replicate the IR function of the original remote. Without it being programmed it replicates the power button on a keyboard, which in Q10 Pro enters the box into standby (a mode Q10 Pro is not designed to support). See here: http://www.futeko.com/simg/mx3-m%20user%20guide.jpg Programming the power button results in a power button that works for turning off most of the time, however, for reasons I am yet to determine, it still sometimes triggers standby. The 100% consistent way to turn Q5/Q10 Pro off with Rii remote is to install CS custom firmware and use the software power button it places on the home screen. This always works and the Rii can always 100% consistently be used to turn box back on.