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:
Visiting Your Dealer
If you have a question that you cannot
resolve using the available help resources,
you can consult your dealer. Please identify
the specific issue (e.g., error occurs when
you enter a specific add ...
Charging the Battery
Disconnect both battery cables to prevent damaging your vehicle’s electrical
system.
Always disconnect the negative (–) cable first, and reconnect it last. ...
Selecting FM/AM Mode
1. Press the FM/AM button.
► Press the FM/AM button again,
if necessary, to select the
frequency band (FM1, FM2,
AM).
► The band and frequency are
displayed.
2. Select AUD ...