Insignia white flashing screen

I already replaced both boards inside. I read online that some had success with replacing a so called T-Con board.
Where would the T-Con board be located on my tv. I tried to find it online for my model, but there was nothing available.
TV is about 3 years old.
Thank you already for your help.

I didn’t find the right solution from the Internet.

References

https://www.cnet.com/forums/discussions/insignia-white-flashing-screen/

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