LG 32LB580V LED LCD backlight problem
My TV recently turned off the backlight. Sound works and with the flashlight I can see the picture. I pulled out the power cord, after a few hours I tried again, worked fine, after about 5 minutes the backlight turned off again, the sound is fine and the flashlight test too. I noticed that if I let it be without power cord around 24 hours, the light will work for about 10 or 15 minutes before it turns off. When the light is working then the LED switch has 111.3-114.6 volts, but when it turns off, it is 144.6 volts. I also tried factory reset, not help.
Visually does not see the traces of burning on the power supply. And when the backlight is on, I don't see dark spots on the screen, all the LEDs seem to work.
Can anyone tell me what the problem is?
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