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:
Low Oil Pressure Indicator
This indicator should never come on when the engine is running. If it starts
flashing or stays on, the oil pressure has dropped very low or lost pressure. Serious
engine damage is possible, and ...
Clock Adjustment
INFO button
► Setup ►Other
►Clock Adjustment►Clock Adjustment
Set the automatic adjustment of the system clock for daylight saving and
international time zones.
Select ...
A/T Differential Backlash Inspection (A/T)
Install the driveshaft and intermediate shaft into the differential
assembly, and place the axles on V-blocks (A).
Measure the backlash of the pinion gears (B) wit ...