It comes to life when you put it in reverse (with a beep to indicate that it was turned on), and shows the back of the car with a rectangle that indicates the safe area behind.
When parking yesterday I noticed that it stopped working - the screen was completely dead (black), although it still beeps when the car is put in reverse.
Every time I put the car in reverse today it either not worked at all (black screen), or only showed the rectangle, but no picture. The parking sensors (audio warning) are still working.
Could it be something as simple as a fuse etc that I can fix myself?