This would require more than a tech usually has access to. The issue could be some other board or LED backlight is pulling more power. More power but less than would trip an overcurrent sensor.
This one is going to be costly to figure out as you may have to swap out all other boards and check current pull on LED strips.
I have a Samsung Un58j5190af that about a month ago just stopped working no lights on the power indicator so we figured the power board went out after replacing the board it worked for two weeks until the same thing happened so I figured maybe we got a bad board so we were sent another and it worked four hours before it went out is it possible something else is to blame for the problem thanks for any help

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