Alain Beguin expuso:
Sorry, Paul, but this is "asking" for problems.
Use the original one, ON4827, order nr Philips 4822 130 63239
The BUT12AF is not heavy enough.

Like Jerry wrote, check the caps in the vicinity of the LOT and also
the solderings of the Hor driver tranformer and the E/W small
transformer. But replace that BU :-)

Merry x-mass

Ok, thanks, I'll try to get the original one...