What do you mean by there is no display? Is the screen totally blank? or does the gear indicator just flashing "--"? This problem definitely has something to do with the computer. If its just flashing "--" count the flashes because this is a code that will tell what the problem is. If is still shows the gear position try resetting the computer. Turn the key on, hold the two ES buttons and while your holding them turn the key off and back on again. The let go of the buttons. -- should be flashing where the gear position usually is, quickly press the up button then the down button, then the up button again. And thats it.