If you're getting the menu that shows the update, help, exit buttons, then the computer is recognizing the hotwire. I've had a few stubborn esc's that I have had to unplug and plug back in a couple times for it to recognize. If that doesn't work, try doing a factory reset of the speedo (hold both buttons down and wait for lights to stat blinking). After the factory reset, try again. Usually that works for me if Someones speedo doesn't want to connect.