Only happens once in a great while. I start bike and take off before the Nav intro is completed. Usually okay and get normal display (not map though since I'm already rolling). Occasionally the screen goes dark & I have to stop & turn bike off/on to make it come on. Manual says this could happen if the unit overheats but it happened a couple times when temp was in the 30s. Bought the (2010) bike new - so it's under warranty but I figure the Service dept will say they could not duplicate the problem.