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:
Adjusting the Steering Wheel
The steering wheel height and distance from your body can be adjusted so that
you
can comfortably grip the steering wheel in an appropriate driving posture.
1. Pull the steering wheel adjustment ...
Dashboard Vent Removal/Installation
Side Vent
Click here for an interactive version of this procedure (driver's,
passenger's).
NOTE: Take care not to scratch the dashboard or its related parts.
Pull the upper portion ( ...
Canceling Your Route
1 Press the DEST button.
2 Select Cancel Route.
From the map screen:
1 Select MAP MENU.
2 Select Cancel Route.
...