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:
Installation
Install ECT sensor 1 (A) with a new O-ring (B).
Install the water bypass hose (C).
Remove all of the old liquid gasket from the water outlet mating
surfaces, the bolts ...
iPod®/USB Flash
If an error occurs while playing an iPod® or USB flash drive, you may see the
following error messages. If you cannot clear the error message, contact a
dealer.
...
Drive Belt Auto-Tensioner Pulley Replacement
Remove the auto-tensioner.
Remove the tensioner pulley.
Install the tensioner pulley in the reverse order of removal.
Install the auto-tensioner.
...