How do I reset the nav system?

I have a strange problem.

I shut the car off, but the nav system is still on. Both screens are still lit.

The ignition is off, and the doors lock. But, I can't open the trunk without using the manual release.

The XM radio is inoperative, and the Bluetooth interface is stuck on "initializing". AcuraLink is unavailable.

A clarification: the actual navigation system works fine. It is everything else (radio, Bluetooth, eve the climate control) that is wonky.

I think I read a post in which someone described how to reset the system. Is there a button sequence to do it?

I am hoping the battery isn't dead in the morning.