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I have a Samsung tv. Un65j6200af and it had no lights so I replaced the LEDs thinking that was the problem. Now I get a very faint light I see the Samsung logo then 2 big vertical blue bars then back to black. I’ve also replaced the tcon board. Also when I unplug the cable from the main board to the power board and plug it in the wall nothing happens but when I unplug all the leds flash once. Could it be the main board or power board?What do you think the problem could be? If you have time I would really appreciate it. Thank you!
djrms357 if you tried to unplug the mainboard from the power board and your backlight did not come on, it is commonly the power board. Measure the voltage outputs from the power board to the main board as well as to the LED’s. Compare that voltage with what is printed on the power board. Let us know what you find out. Also, post some good pictures of your boards with your question. The part that is unusual is this “2 big vertical blue bars then back to black “
