To whomever it applies, I'm passing along the following alert from The Coin-Op Cauldron:
Capcom pinball owners should check the C2 (220uf/25v) capacitor on the display high voltage power supply board for leakage. The residue is usually green to gray. If the corrosion spreads to nearby components, they may short and render the board useless. This board is no longer available.
Hope this helps somebody avoid future problems...