Power problem with Jet Set Radio?

[BigTinz]

I recently was given a problematic Jet Set Radio pachislo. The original owner claims to have been playing the machine when he heard a loud pop and smoke started coming out of the machine. He believes it was the transformer that died...so he says he purchased a new transformer and installed it. Now the machine powers up but only the front lights(the "belly" of the machine) light up. The LCD does not turn on and no sound can be heard.

He believes that the transformer he installed is too weak and that a new one will solve the problem.

I know very little about pachislos or wiring/soldering. What does the transformer look like and how can I tell if it's not strong enough for the machine? Then...where could I buy an original or same type?

I can take pictures if necessary.

Thanks