Thanks. I had guessed that it was one ground on the SBPro and two on the
Toshiba, but I don't think (I'll look again) that either set of docs
indicated which might be which. However, after holding the SBPro up to a
400 watt halogen lamp I think I can see which traces go to ground. When I
can find the connectors (I'll look at Radio Shack – thanks) I'll work up
the courage to try it.
Steve