Are all 4 speaker channels working when it does this?

Never had a problem with the speakers in or out of the car. I'm not sure what your referring to?

Are you connecting with Ethernet or USB?

I am connect with both the serial port and ethernet wich is DHCP and my home computer has been assigning it an address with no problem. Although it does give it a different address each time which bugs me. I don't bother with USB if I can avoid it.