Quoted from bronco-jon:
After cleaning it up some with just water and a small brissel brush (I need to go buy some vinegar) it actually doesn't look too bad. I cut what was left of the battery holder off and just left the prongs. I don't see any broken or corroded through tracers.
do you think there is a chance of it being ok? I pulled the first three chips out and cleaned the sockets up best I could with what I have. is there anything else that works good on cleaning up the board? and do you know of a link you can send me that covers this repair you are talking about? thanks
Vid's system 3-7 guide should give you a good overview: https://pinside.com/pinball/forum/topic/vids-guide-to-bulletproofing-williams-system-6
I just pulled those three chips (IC 21,22,25) off completely, and replaced the sockets for 17, 19, + 20. Get a new rom for IC 14. If the corrosion reached the big connector along the bottom, replace it. Sand the corroded area till you've got nice shiny copper anywhere you had corrosion, clean it off with vinegar, water, and alcohol. Unlike other manufacturers (gottlieb, bally), the battery isn't near the reset area on williams boards, so the battery can do a lot less damage and they're more salvagable