Quoted from ChrisHibler:Well, I suspect the VN02 Pentawatt devices sold by Marco are counterfeits.
I repaired this board today using an NOS VN02 I had purchased from G-P-E ages ago.
It's good to go now.
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Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/Contact ... for board repairs
http://www.PinWiki.com - The Place to go for Pinball Repair Info
Awesome for the OP, really terrible news for all WPT (and other Sterns that use this) owners.....and want-to-be-owners-again such as myself. WPT is to be the basis of my Voltron custom pin if I can ever get back to it. It's really unfortunate that with older components there's so many easily substitute-workable replacements for obsolete components, but these bloody IC's that aren't even 20 years old are impossible to find.