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.

look here:

http://avic411.com/index.php?/topic/33134-working-custom-appsnav-launcher-for-u310bt-f310bt/

try to boot into testmode. if the touchscreen is responsive in testmode, then your app may be hosed up... no worries.. just follow steps 1 & 2 to update/reinstall the application

My touch panel refuses to calibrate, when you click the calibrate setting. you keep clicking the targets and it never ends. im currently clicking about an inch to the left....

i would send it to a guy i have use many times to repair pioneer units in connecticut, google jo-di's radio repair , newfield avenue, i forgot the town, but he is fast and great prices, pioneer will charge a small fortune to replace the touch screen. let me know how you make out.