Thank you very much for your help all.
It has worked now

The problem was, I swapped 2 Telefunken remote controls and
the OK button on the other remote did not appear to be the correct signal
It has flashed it, but the TV goes on briefly and then goes off again.
I just connected it to a damaged panel for testing,
I will test again on a healthy panel and see what it shows.
Maybe the board is lost for ever
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