Yesterday, my touch screen was blank-dead, black, and unresponsive. Driving shift lever appeared to work. I had to go somewhere and was in a hurry and was apprehensive. I called the Tesla service and they were helpful and assured me that the computer needed rebooting. I didn't know how to reboot. Here are the instructions. 1. Hold the two rotating knobs on the steering wheel together until you see the Tesla emblem on the screen. 2. You can release the knobs now. 3. Wait for the computer to boot. 4. wait for about 30 secs to make sure that everything is OK. Also, when you call Tesla, keep your WIN # ready!