Main ribbon cables installed upsidedown

i was replacing the screen and frame of this s21 ultra, but i didn't pay attention and installed the main ribbon cable upsidedown. it boot looped for a moment. i thought it was because i didn't attach the wireless coil. But now it wont turn on even with the old screen. Do you guys think it's fixable?

Answer this question I have this problem too

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Any luck finding the solution or damage this caused? I'm in the same situation. Not sure what I should replace the main board?

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