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:
Door Glass Adjustment
NOTE: Check the weatherstrips and glass run channel for damage or deterioration,
and replace them if necessary.
Place the vehicle on a firm, level surface.
Remove these items:
...
Rear Seat-Back Cover/Pad Replacement
Special Tools Required
KTC Trim Tool Set SOJATP2014
*Available through the Honda Tool and Equipment Program; call
888-424-6857
NOTE:
Use the appropriate tool from the KTC trim to ...
Driver's Seat Position Sensor Replacement
Removal
NOTE: Do not turn the ignition switch to ON (II), and do not connect the
battery cable while removing the driver's seat position sensor.
Do the battery terminal disconnection ...