Are there any threads I can use for a check list of gps problems? I have no way to test the gps cable but it was working on a previous radio so I believe it's good. The GPS is stuck at my house and never moves. I can enter the maintenance menu and the gps has pulled data (my house) but does not change. I have my language and time zone set and the DVD has good America map data. I'm not sure what also to check. That cable seems to be connected.