Quoted from Archieball:I managed to figure out what has happened. It is a total disaster. The interlock switch wire has accidentally been fixed to the start button, so when the button was pressed there was a lot of high voltage all over the place.
This can potentially destroy a lot.
https://pinside.com/pinball/forum/topic/ij-help-with-disconnected-wire
part of switch matrix will fail.
Best repair cpu-board and start testing without solenoid power.