might be worth having a good look at the pcb for blown components or track, may be another issue caused it to pop. As a rule, if you have 230v to the pcb you should get lights or something showing life, if not then pcb had it.
i have one of these … when turn knob on sometimes works sometimes doesn’t … can sometimes see a tiny bit light .. on lcd but sometimes ,, nothing at all ? am thinking the pcb is faulty ? anyone else had luck … fixing them ?