after i replaced the crook line filter on Buck, i rewired the mains fuse on it's bottom board so that it was BEFORE the line filter, just incase it happened again! (the fuse was originally wired AFTER the line filter).
Thats what I was driving at, thought all the line filters were after main fuse.
Might have to check my machines, pretty sure filters are after fuse, is on Cyclone cause I was looking at that the other week as per another thread somewhere....
I know that the early SS machines.. Sys 1 Gtb and early Bally /Stern SS had the power leads connected directly into the input side of the line filters, and the fuse on the output side of the filter. Im not sure about the later games how they were set up though