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
This chapter discusses driving, refueling, and information on items such as
accessories. ...
Exploded view
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"Honda_Special_Symbols";src:url(/sta ...
Making a Call
Make calls by entering a number or using the imported phonebook, call
history, or
speed dial entries.
You can control the HFL system using voice
commands.
When you say “Call by number”
or ...