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:
Map, Voice, Entering Destinations
...
Auxiliary Input Jack
Use the jack in the console compartment to connect standard audio devices.
1. Open the AUX cover.
2. Connect a standard audio device to
the input jack using a 1/8 inch/3.5
mm stereo miniplug.
& ...
Audio
The advanced audio system provides clear, well-defined sound and makes the
most of your music.
Enjoy listening to a variety of audio sources, such as:
AM/FM Radio
Compact Disc
iPod®
USB ...