Hi, all of the speakers in my 2008 Volvo S60 have gone out (at once) except for the middle speaker on the top of the dashboard. Any ideas what could be causing this? I read on some forum that the HU-850 system has something under the front seat that could have gotten wet & caused a part or fuse or something to short out. It said "they" were easy to change but I can not find the forum again. Does anyone know what that was talking about and who/where I could take the car? The Volvo dealership said they did not really work on audio systems.