Hey guys, I have a Q90R 75” TV. Yesterday I tried turning it on and it would turn on the back light briefly, go out, then come back on for a very short period of time, it continually repeated this process.
I’ve open the tv up today and played around and found that if I disconnect the 16 pin plug going between motherboards the backlight stays on permanently and the tv has sound.
I would really appreciate and advice :)
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@joshallan "if I disconnect the 16 pin plug going between motherboards the backlight stays on permanently and the tv has sound" Good, that means you have a working backlight array. So, now the question is what has failed. Since you have sound but no picture, it appears to be the T-con board We would need to see all of your boards, so post some good pictures of those with your QUESTION. That way we can see what you see. Adding images to an existing question - iFixit Repair Guide
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