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:
Maintenance
This chapter discusses basic maintenance. ...
Steering Rack Guide Removal/Installation
NOTE: During removal/installation, do not allow dust, dirt, or other foreign
materials to enter the steering gearbox.
Remove the steering gearbox.
Loosen the locknut (A), then ...
Audio Screen Control
AUDIO button (in DISC mode)
Control the audio system through the navigation screen.
Select a track.
► Select the Folder tab to display the
list of folders on M/WMA/AAC
discs having a f ...