Depending on the length of time the power was interrupted, your system may require GPS initialization.

If initialization is not necessary, the system proceeds directly to the Startup Confirmation screen.
If the system fails to locate a sufficient number of satellites to locate your position within 10 minutes, the following screen is displayed.

If you are experiencing GPS reception problems:
Rectifier Test
Check for continuity in each direction, between the B terminal and P terminals,
and between the E terminal and P terminals of each diode pair. All diodes should
have continuity in only one ...
Guidance Menu
MAP MENU (on map)
►Guidance Menu
Display the guidance points and freeway exits for your route, and set the
display
mode for the map and guidance screens.
Select an item.
The following ...
Identification Numbers
Your vehicle has several identifying numbers in various places.
The vehicle identification number (VIN) is the 17-digit number your dealer uses
to register your vehicle for warranty purposes. It is ...