Why did my radio screen go black?
Restart Your Car’s Infotainment System
The reason you’re facing the black screen issue may not even be related to Android Auto on your phone. It could be that your car’s stereo system or head unit is malfunctioning, so you’re unable to use Android Auto. A quick fix for this issue is to restart your car’s head unit.
Why is my car display screen not working?
A cracked touch screen is one of the main reasons that lead to an unresponsive car stereo screen. Check out for visible damages. If the screen has cracks or visible damage, you probably need to repair it. Sometimes, even minute scratches can lead to a faulty touch screen for your car stereo.