my guess would be a loose conection somewhere. Go out to yer bike,turn the key to the on position,see how every light on the speedo/tach lights up for a second. Did the neutral indicator , light up for a second? If it did, thats good. That means the LED (light emitting diode) for that function is still working, you dont want a blown LED, these guages dont have bulbs as was suggested, they are LED and LCD(liquid crystal display). So... go do that test for me, and we'll take it from there.
hav a good 1...RSD.