This is a big problem I need fixed. I did try holding the on-off switch for the light for 8 seconds to reset but that did not change anything. Also there seems to be a problem with the radar not syncing when I turn my Garmin on at times. This unit should work better than it does, it does not operate in a consistent manner. The flashing light turning itself off is the big problem. In looking at the Help Forum this seems to have been a known problem for a long time.