Garmin g80 not picking up details when I hit a ball.

Have just purchased the garmin g80, so started using the launch monitor, however without any success. Have setup less than a foot from the ball as described in the manual but all I get once I’ve taken a shot is a few circles showing on screen, then nothing. All the fields such as carry speed etc go blank, I then have to come out of the launch monitor mode then go back in. So far after 2 hours of using the product, I have been unable to get any details what so ever.  I upgrade the firmware when I registered the product and the courses so everything is up to date.  Does anyone have any suggestions/thoughts