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:
Ignition Coil and Spark Plug Removal/Installation
Remove the under-cowl panel.
Disconnect the ignition coil connectors (A), then remove the ignition
coils (B).
Remove the spark plugs, and inspect them.
...
Map Update
INFO button
►Map Update
Update the map database.
When you order a map update, it is mailed to
you on a USB flash drive. ...
CD Player
If a disc error occurs, you may see the following error messages.
...