Lots of things can cause an electrical fire, electrical fire is on my list (way down). But I don't think that was it. Too many sensors to allow damage to go otherwise undetected in this particular case, as I said.
Mi initial comment was to someone who asked how would it be possible for neither pilot to communicate. Using the subject of this thread, Rush talks to a 777 pilot, i attempted to expand upon their thoughts and explain more deeply.
Me personally, professionally speaking, way to early to formulate any ideas of cause. Will wait for the facts as they come in. If one starts to formulate concepts and conclusions before the facts, the mind is too closed to accept anything else but what one believes in that moment.