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:
High-Mount Brake Light Bulb
High-mount brake light bulb is a LED type. Have an authorized Honda dealer
inspect
and replace the light bulb. ...
Instrument Panel Indicators
The instrument panel has many indicators that give you important information
about your vehicle.
Malfunction Indicator Lamp
Low Oil Pressure Indicator
The engine can be severely damaged if th ...
Fuse Locations
INTERIOR FUSE BOX
UNDER-HOOD FUSE BOXES
Primary Fuse Box
Secondary Fuse Box (On the battery)
...