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:
Audio Screen Control
AUDIO button (in USB mode)
Control the audio screen through the navigation system.
Select a track.
Select the Folder tab to display the
folder list.
The following items are available:
...
Ignition Switch Replacement
NOTE: SRS components are located in the area. Review the
SRS component locations, and
precautions and procedures before doing repairs or
servicing.
Do the battery terminal di ...
Resolving Problems
If you run into a specific issue that you
cannot resolve, consult the following help
resources:
• For navigation system issues:
There are also FAQs available online at
automobiles.honda.com.
â ...