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:
Reassembly
Install the upper spring seat (A) to the upper spring seat clip (B).
NOTE: Make sure to securely set the upper spring seat to the hook (C) on
the spring seat clip.
...
Brake Master Cylinder Inspection
Remove the master cylinder.
Inspect and note these items:
Before reassembling, check that all parts are free of dirt and other
foreign particles.
Do not t ...
Side Vent
Click here for an interactive version of this procedure (driver's,
passenger's).
NOTE: Take care not to scratch the dashboard or its related parts.
Pull the upper portion (A) of the s ...