After I turned on TV and remote led sensor blinking 5times. Backlight does not work .I found one bad led bulb and power supply is ok. it's open circuit. So I shorted circuit of a bad led bulb. it's work again. I don't have spare led bulbs and Bulb Led can be found at a TV repair shop . https://www.youtube.com/watch?v=eEJoPCa7Kt0 (How to test led bulbs)
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