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:
On-Screen Commands
The system accepts these commands on
any screen. There are over 100 on-screen
commands. Say what is written on the
screen to activate that selection. For lists,
you can say the list item number to ...
Battery
WARNING
The battery gives off explosive hydrogen
gas during normal operation.
A spark or flame can cause the battery to
explode with enough force to kill or
seriously hurt you.
When conducti ...
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 ...