Hi Mike-

Well, I bought another Lenz Set 100 on eBay (I got a pretty good deal and I was able to get it very fast) and that one works fine, confirming there is a problem with my original LZV100.  With this new unit, the handhelds flash "Off" when I power the set on, as I suspected.  Good idea about the battery-- I will check that.

By the way, it turns out that to use Touchcab I need to upgrade the Lenz system to version 3.6 (both of mine are now 3.5).  Sometimes it seems like one just can't win!

Thanks to all for your input.

Richard.