I have a problem with my music keg. I'm somewhat familar with music kegs since I have had one in my civic that has never given me a problem since 2003. So thought it would be nice to have another one and I picked up a used keg installed the newest firmware and seems to have updated just fine. My problem is that all I get from the headunit is a buzzing sound. The tracks show up, the text shows up, and everything else except the actual music. I first had it plugged into a KMD-671R minidisc deck which from a CD changer perspective everything worked except for sound. According to Kenwood this HU is not compatible with the music keg, its too old. I have to have something 1999 and newer. So I just picked up a KDC-MP438U HU and I'm still having the same problem. This one recognizes it as a harddrive ext and shows all the tracks too, but still the same buzzing sound, no music. So I am stumped. I have a newer HU, new music keg cable from pac parts, everything works fine in both Media Manager and Music Manager, but nothing is making it play music through my speakers. Do I have another non-compatible HU? Could the cable be defective? Could the Music Keg be defective? If someone could shed some light on my problem I would greatly appreciate it. Thank you.