Asteroids - Loud Humming?

I just picked up an Asteroids machine that was supposed to be in good working condition...not quite the case as I've discovered!

The main issue at the moment is that the machine produces a very loud very annoying humming. Any thoughts as to where to start on repair? I read somewhere that the big capacitor on the power brick is the likely culprit. Is that true? If so, is there any inherent danger in replacing it myself? Should I be looking at a different starting solution?

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Received on Sun Jun 27 18:08:21 2010