Why is my phone’s screen still black?

Unfortunately, there isn't a single issue that can create a black screen on your Android. Here are a few possibilities, but there could be more:

1. The LCD connectors on the screen could be loose.
2. A critical system problem has occurred.
3. It's possible that you've installed programs that aren't compatible.
4. It's possible that the phone was overcharged for a long time.
5. It's necessary to clean the app caches.
6. The phone has been subjected to high temperatures.