It's possible that dust and debris will prevent your phone from charging properly. Wait until the phone's batteries are entirely depleted and the phone shuts down before charging it and restarting it. This should get your phone working again if there is a critical system fault producing the black screen.
Solution
Force the phone to restart. A hard restart can clear up a lot of crucial system issues. Depending on the model of Android phone you have, you may need to press a combination of buttons to force the phone to restart, such as:
- Press and hold the Home, Power, and Volume Down/Up buttons at the same time.
- Hold down the Home and Power buttons.
- Hold down the Power/Bixby button until the phone totally turns down.
- After your phone has completely shut down, remember to restart it.
