The power supply of the speaker display is abnormal, resulting in the screen display circuit not working normally;
The speaker display screen is not bright due to the open circuit of the speaker connecting cable;
The interface of the sound box coupler is in poor contact or open welding.
Corresponding solutions to the above situation:
Check the power supply circuit of the display in the sound box, and replace it in time if any components are damaged to ensure the normal working voltage of the screen display circuit;
Check all connecting wires and terminals, and weld them firmly in time if there is any open welding or false connection;
Check the coupler interface, replace it in time if it is damaged, and weld it in time if there is any virtual connection.
Note: Square dance speakers and multimedia speakers have display screens. If there is something wrong with the multimedia speaker, please check whether there is something wrong with the computer, which makes the speaker display screen not bright.