I have a Kenwood VR 2080 A/V receiver that doesn't produce any sound out the speakers. All the fuses are good. I've read that this is a very common problem with these units and was wondering if anyone has had the same problem and what has gone bad. It's been sitting in my closet for the past 3-4 years and I figured maybe it's time to check it out. Any info would be greatly appreciated. Thank you.