Always keep extra flipper opto-interrupters handy. Black ones are best.
Quoted from markp99:
Diode Corollary: A single $0.05 diode can knock out the entire HV leg of a power supply! ...and a 5 minute repair can bring it all back to life!
Sounds like I lucked out - no blown fuses or burnt transistors. After replacing a broken standup target on my TOTAN I found that hitting it during play activated the left ball save.
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