Patches and discussion for Ensoniq VFX family

hi guys (and girls?! are there girls here?! don't know...),
I was jamming in my studio; after two hours circa I heard a 'boom' through my studio monitors, and guess what!?, my sd-1 display was black...
I turned the power off and on again to see what was going on, and the display was working again, so I played 2/3 notes just to be sure it was still making sounds, then I switched it off because I was a bit scared by what had just happened...

of course the zone near the psu was hot as hell (just the way it always is), so I guess I should not let it powered on unless I really need to use it (I wasn't even playing it today...)

so, what did happen?! a fuse blown?! 

I have yet to open it, so I guess I should be looking for something in particular, given the facts I just described... 
I'm no technician at all, but I think I could easily change blown fuse(s)


greetings

Fabio