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:
Fuel Pressure Relieving
Before disconnecting fuel lines or hoses, relieve pressure from the system by
disabling the fuel pump and disconnecting the fuel line/quick connect fitting in
the engine compartment.
With the HDS ...
Canceling the Route
DEST button (when en route)
►Cancel Route
Cancel the route guidance and remove the destination and all waypoints from
the
destination list. The system then returns to the map screen.
You ...
Adjusting the Mirrors
Keep the inside and outside mirrors clean and
adjusted for best visibility.
Adjust the mirrors before you start driving. ...