Thanks for the prompt response. The microsoft site for this specific key board kept referring to an "on" key and a led light; also a "pair" key(s). I still don't know where those are. And I had not heard of a "dongle" but it too was mentioned on the MS site. Anyway, thanks for the what to do.
In the meantime, even though I had changed out the batteries in the key board, i just went back and checked the two "new ones, literally bought yesterday, and one was not good, replaced that one and the keyboard was back in action. Anyway, again thanks for the response. I may have need of it in the future. Dave39g