Problem with a new Mac Mini communicating with KB & TrackPad
I have a new Mac Mini that I have been using for about a week. When I came home from supper, I was unable to "wake" the screen. It turns out that neither my Magic Keyboard nor my Magic Trackpad - both also brand new - are talking to the Mini. I plugged in the KB, but the Mini still does not respond. I was able to get the monitor on by briefly engaging the power button on it, but the KB & Trackpad remain unavailable. Ideas?
OS 10.11.4
Mac mini (Late 2014), OS X El Capitan (10.11.4)