Batman Pachislo 2014 Electa

[Batmanslot]

I took a chance and imported this machine from Japan. I assumed it needed a transformer. The machines label states it is the typical 100 volt for Japan. I bought a power volt transformer and spliced it in the power cord. When I plug it in the transformer, hums quietly. Nothing lights up on the machine. Yes, I flipped the internal power switch on and still nothing. When I read the sellers translated description, it states some models come with a transformer. I can't tell if there is a transformer in the box with the power switch on it. Should I remove the power volt transformer and plug it in or am I at risk to fry the boards? Any suggestions/advise would be very much appreciated.