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Which boards did you replace with Alltek? My first reaction in reading this thread is that something is repinned wrong, or a connector is in the wrong spot. Also, double check your coil to coil wiring as someone may have bypassed the burnt out coil in an inappropriate daisy chain. One other thing, if your MPU board is an Alltek and you have the incorrect dip switches installed for your game, you will get some very odd coil and switch behavior.
Quoted from vid1900:Moral of the story:
You absolutely have to repin every Classic Bally if you want it to be bulletproof
There's no way around it
This is so true. Surprisingly, even with repinning connectors being such a low cost solution many people simply don't do it. I just saw some pics of a classic Bally in another thread with many hours in the cosmetics, but still with the original connections, amazing.
Quoted from zacaj:I always reuse the original housings.
I reuse the original housings as well, unless there is some issue. All those IDC connectors get tossed.
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St Charles, MO