Update
Updating database... Please wait.
Friday 12 January 2018 at 13:12
On the sys80b power supply, do not spray the 5 volt adjustment pot. REPLACE the damn thing! it's like 50 cents (500 ohm pot). He's on the right track (in that this pot is failure prone), but it needs replacement, not sprayed with some chemical.
Source: http://pinside.com/pinball/forum/topic/ground-wire-modification-a-todd-tnt-fix-where-can-i-find-the-pins#post-4171956