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:
Driving to Your Destination
This section describes how to follow the route guidance to your destination,
and
choose the icons displayed on the map screen. ...
Dashboard Passenger's Tray Lid Removal/Installation
NOTE: Take care not to scratch the dashboard or its related parts.
Open the lid.
Remove the screws, then remove the passenger's upper tray lid (A).
...
Rocker Arm and Shaft Disassembly/Reassembly
NOTE:
Identify each part as it is removed so that each item can be reinstalled
in its original location.
Inspect the rocker arm shaft and the rocker arms.
If reused, the ...