Strategy One: No Backlight, Dim Image — The power supply of the smart TV is normal; it may be an issue with the TV's driver backlight circuit, causing the screen to go black with sound. As you approach the screen, you can notice that it displays an extremely dim image, which proves that the signal processing part of the driver board isThe issue with the television is due to a malfunction in the function circuit of the high-voltage control board for the backlight driver. By resolving the fault in the function circuit, the television's image can be restored.

2. The TV screen goes black, the buttons are unresponsive, and the indicator lights do not illuminate (5V fault).

Solution Two: The 5V voltage of the power supply is overloaded, pulling the voltage too low, or there is an issue with the downstream signal processor, causing some circuit damage. In this case, it is necessary to sequentially troubleshoot and replace the faulty components.In addition to identifying and replacing faulty components, the voltage can be restored to normal.

3. Televisions experience incompatibility issues with software, resulting in system crashes and black screens.

4. There was an issue of black screen with sound during the online playback.

TV BaseThis structure

The television set is primarily composed of modules, mainboards, power boards, logic T-CON boards, speakers, buttons, indicator lights, and functional modules. The modules are mainly responsible for the TV display, the mainboard controls the module display and handles interface input signals, the power board mainly provides power supply to the TV (converting 220V to various required voltages), the logic board primarily processes the mainboard signals to module display signals, the speakers are mainly for built-in sound playback, and the indicator lights mainly indicate whether the startup process is functioning.