Don't just replace the MOSFET and hope for the best.
Usually the MOSFET shorted BECAUSE something else...
You should replace the MOSFET and PRIOR to turning
things on again checking all caps related to that MOSFET
YOU ARE REQUIRED TO USE A VARIAC WITH DIM BULBS
to prevent another short... This will save you time and money
SMPS - in particular modern integrated and PFC models are
not trivial just replace and go ...
You should also check 2 SMPS typical problems
- LOAD SHORTs
- SOFT START failures.
This model in particular uses a 431 feedback loop which
requires some thinking on the load/start procedure.
NOT trivial .. random things will just be lucky shots. or not
Paul