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Friday 27 October 2017 at 16:06
Hmm, these are cheap enough that maybe I'll get a bunch of them and try inserting them between the connectors.
https://www.amazon.com/Icstation-Channel-Optocoupler-Isolation-Board/dp/B01N1F5UIM/ref=pd_sbs_328_2?_encoding=UTF8&pd_rd_i=B01N1F5UIM&pd_rd_r=TXD4PWN2WC0P95ZG1JZP&pd_rd_w=XY1...
Source: http://pinside.com/pinball/forum/topic/totan-blowing-cpu-board-chips#post-4042066