I have purchased 2 avics in the past couple weeks. A f700bt and a f900bt. One had a severed usb cable. The other was in really good shape. I spliced and reinforced the usb cable on the severed one. I noticed that the cable had been pulled free of the plug on the circuit board. Easy fix, just some dismantling plug back in and reassemble. I wasn't surprised by this on the severed usb cable unit. The really nice 900bt wouldn't recognize anything usb related. Since I had the previous experience with the unplugged usb on the 700bt, I looked inside. Sure thing! Plugged it back in and works like a ch