The radio/navigation system in my vehicle malfunctioned during a self starting update. My screen now stays in reboot mode. The problem is, the screen stays at full brightness whenever the car is on at night I canât see very well to drive. The other night I was coming home with me and my kids in the car and i hit the ditch trying to turn because the screen was so bright it impaired my vision. The screen never goes off as long as the car is running and there is way to adjust the brightness.