Do you know how to use[URL="http://www.**********.com/index.php?id_product=8&controller=product"] launch x431 diagun [/URL]? let me show you . Plug in x431 diagun main unit and press power key on the main board, tips for calibrating the touch screen will be displayed, press hotkey to begin calibrating, see chapter calibrate touch screen for operation procedure, if you are not willing to calibrate ,please wait and enter into star up interface, see figure on the left ,launch ...