Why is there no message prompt on the black screen of lg mobile phone?

The screen of mobile phone is not bright, which belongs to black screen. The reasons for the black screen are as follows:

1, overheating of mobile phone: after opening too many programs, the cpu load of mobile phone is too high, the mobile phone is overheated, and the screen is black due to insufficient power supply. It is recommended to close other programs running in the background;

2. The downloaded software is incompatible: some software can't adapt to the mobile phone model, and the screen will be blank when installed and opened, so just uninstall the software;

It is normal to put it in your ear to answer the phone when you are on the phone. If it is still in a black screen state when it leaves the ear, it is suspected that the sensor is damaged and needs maintenance;

4. Cable failure or poor contact, screen damage, etc. : If the above reasons cannot be ruled out, it is recommended to go to the mobile phone after-sales point for inspection and maintenance.