OK, found the problem. In trying to resolve the pwr-up order issue I raised in July 12 post, the gps had been re-set to the 320B backup...which has older software & doesn't display satellite status. Re-set 330B as primary and now see all.
Does make for a product development suggestion though: couldn't gps antenna software be updated via the MFD? Most of us would find disconnecting the antennae and returning them to a Furuno dealer a hassle....& must be costly for Furuno, too.
rgds