Question with power for pioneer avic f700bt

[e36er]

Hello, ladies and gentlemen.
I have an issue with pioneer avic f700bt that I've been using it for last year or so.
Until today, it's been working just FINE!!
1. Suddenly my f700bt wouldn't turn on.
When I start the vehicle, it boots but then after 30-40 seconds, it loses its power.
If I restart the vehicle, it does the same thing.


2. Also, my f700bt has the ipod connection.
For CD, radio, and SD card, the volume is controllable and sounds very nice.
But with Ipod/Iphone connection, volume is FIXED and sound quality is not as good (it's not bad but i think it's missing the bass).

Any recommendations?

Thank you very much in advance.