Hmmm.... well, I was indeed a pin off on the cable which attaches to the board, so it now turns on. Huzzah! But, it doesn't get much further

Are you sure you weren't two pins off, and you only moved the connector over by one pin??

I seem to remember that one of my connectors (Sorry -- don't remember for sure if it was to the drive or to the board) showed two pairs of pins not covered by the connector when the connector was in the proper position.

tanstaafl.