I just purchased my U310BT a week ago from ebay. I just got around to installing the radio to find out that the touch screen is not working!!!! I tried resetting it but had no luck. I can see images and can scroll through the modes with the knob, but I cannot press any touch screen buttons. When I go to navigation mode, I cannot get past the "OK" button on the initial screen. What is weird about my issue is that when the screen dims out, I can press the screen to get it to light up, but cannot press the buttons on the screen. Also, I tried updating it but the radio is not detecting my 8gb sd card.