LCD TV backlight failure reasons

When the backlight is turned on, the LCD screen lights up and then goes out. At this time, the audio, remote control, and panel key control functions are all normal. This phenomenon is caused by the protection of the backlight circuit, mostly due to the abnormal power supply of the backlight booster board. For the CCFL backlight circuit, if a certain backlight tube is open circuit (usually the circuit protection caused by the open welding of the lamp socket on the backlight booster board or the socket is not tightly inserted) or a certain lamp is broken, the above faults can be caused.