[SpEcIaL-K]

Mine used to do that quite often. It got to the point where I would put in the code and the system would just stay stuck at the Acura splash screen. Turned out that the DVD unit for the navigation system was going out and had to send it out to Alpine for repairs. Seems to happen a lot for the 04.

 

[SpEcIaL-K]

I believe it was $350 plus shipping costs.
Alpine Electronics of America, Inc.
Hope you get it worked out.