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I have an RCA LED55C55R120Q 55" LED LCD tv. The screen went black.

There is sound but no picture. No image in a dark room while holding a flashlight up. Tried replacing the main power board, the logic board and the led driver board and still nothing. Occasionally when it attempts to turn on, there is a quick flash..but only maybe 20 percent of the time. This quick flash that happens sometimes makes me question if the LED panel if actually the problem. Can someone help me out here.

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skywalkerspawn  this”the main power board, the logic board and the led driver board “ sounds like you replaced the power board, main board and I am not sure what you are referring to as the LED driver board. Your set has a T-con board. Most t-con boards are fused, you should check that board as well. After that, you really do not have any other boards left so the quick flash etc. could be a failed backlight array. Measure the output from your power board to the array and see what the voltages show and if they are consistant or if they go up and down. At the LED + pins you should get ~ 132V when you turn it on. If ithat voltage drops quickly than it is most likely your LED backlight strips. It’s best if you post some good pictures of all of your boards and the complete layout with wiring. Post those with your question. That way we can see what you see and can hopefully help you further in getting this fixed.Adding images to an existing question

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I am having the same trouble but haven’t replaced any components yet. I’m trying to figure out how to upload pics to you guys so I could hopefully take advantage of your electronic knowledge and save a few bucks. Thanks guys

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skywalkerspawn will be eternally grateful.
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