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:
Reassembly
Install the upper spring seat (A) to the upper spring seat clip (B).
NOTE: Make sure to securely set the upper spring seat to the hook (C) on
the spring seat clip.
...
Resuming Your Trip
Stop your vehicle en route (e.g., to rest, stop for gas, etc.), and then
continue on
your route.
If you did not complete your route, the Continue Trip screen is displayed when
you
restart you ...
Windshield Replacement
NOTE:
Put on gloves to protect your hands.
Wear eye protection while cutting the glass adhesive with a piano wire.
Use seat covers to avoid damaging any surface.
Glass a ...