I just leave the damn thing's on anyway.  Even if you turn them off, there is a message on the screen that you need to press power to view tv.  Most of the phone calls I get are why can I not change channels, I have to tell the client to manually unplug the power cable, wait 1 minute, and then plug the damn thing back in.  This is the weakest link IMHO of any system.  DirecTV and Dish are no better in this regard.