I just returned from a 3 week roadtrip in my 2004 XC70. FORTUNATELY, on my last day as I was only a handful of miles from my house, the stereo (HU-613) started acting up: only the right-side speakers worked. I tried playing with everything... fader, balance, bass/treble, and no luck with the left-side. I also tried different inputs (CD, radio, CD changer). I just checked again, and it seems like now its only the right-rear speakers that are working. Before I start disassembling for random troubleshooting, can anyone provide some suggestions as to where I should start or what I should check for? I don't want to go in blindly. Thanks in advance!