What's wrong with the Audi a4 reversing image not being displayed?

The Audi A4 reversing image is not displayed, indicating that there is something wrong with the lens or display circuit of the reversing image. Need to check the wiring and the camera for reversing. Reversing images are also called parking assistance system, reversing visual system, vehicle monitoring system, etc. The system is widely used in all kinds of large, medium and small vehicles in the field of reversing or driving safety, helping drivers to see the rear of the car clearly when reversing and prevent unnecessary collisions. After years of development, technical upgrading and performance improvement, the reversing image technology has been improved. No matter from the appearance or performance, the current products have their own characteristics. With the continuous maturity of reversing image technology, the cost has dropped again and again, so now reversing image is no longer the patent of mid-to high-end cars, and even ordinary cars and trucks have been equipped with reversing images. Million car purchase subsidy