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:
How to Enter Information
You can enter information (e.g., city names, street names, personal names,
and business names comprising letters, numbers, and symbols)
when prompted on input screens by two different methods. ...
Transmission Fluid
Automatic Transmission Fluid
Check the fluid level with the engine at normal operating temperature.
1. Park the vehicle on level ground.
Start the engine, let it run until the radiator fan comes ...
A/T Clutch Pressure Control Solenoid Valve B and C Replacement (A/T)
Remove the air cleaner assembly.
Remove the breather hose (A) from its clamp (B), and remove the breather
hose clamp bracket (C).
Disconnect the connectors (A) ...