Mr. Pinball Tip:

Solid state games use low voltage current in the switch circuits. That is why they require gold-plated contacts on the switches. Otherwise switch closure will not be reliably detected. In a pinch you can substitute a clean silver contact point for a damaged gold contact, but this will not work long term. If you want it to work trouble-free for the long term you have to use gold contact points. The problem with silver and other metals besides gold is that they corrode. That is why gold is preferred--it does not corrode.
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