Anyone know what I have to do to get the map down?
I The Manual and help contents tell me that I can receive the map from the GPS and it is on the menu bar on the top of the screen.
The ? actually alternates with a black triangle. It's show you that the units last location was at that point but is doesn't currently have a fix of your actual position.
In short its telling you "I think you're here but are you?".
The ? disappears once your 76CSx has a fix.