Conspiracy theorists>>>> what do u think??

apparantly the boeing 777 lost all power! how is that possible? i have never been known to be a conspiracy theorist but i thought about it in my normal trail of thought and to me a plane cant just "lose all power" for no reason! then i got to thunkin! what if this was a terror threat on a practice run?? i have seen this kind of thing happen on a film>> the day after tommorow and oceans 11! the latter using an electromagnetic pulse (but not on a plane!)! what if someone on that plane used an electromagnetic pulse to knock out the power on the plane as it would not be possible from the ground as its to far from the plane not to be noticed so has to come from onboard to only affect the aircraft??? your thoughts please??!!