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:
Windshield Washers
Check the fluid level in the windshield washer reservoir at least monthly during
normal use.
Check the fluid level by removing the cap and looking at the level gauge
On Canadian models: The low ...
MTF Inspection and Replacement (M/T)
Park the vehicle on level ground, and turn the engine off.
Raise the vehicle on a lift, and make sure it is securely supported.
Remove the splash shield.
...
Rotor Slip Ring Test
Measure the resistance between the slip rings (A):
If the resistance is within the standard, go to step
22.
If the resistance is not within the standard, replace the roto ...