Sys. 80 So far I have cleaned all the edge connectors. Did the ground mods according to John's Jukes. Replaced coil diode. Changed out big orange cap. Rebuilt power supply. The fuse will blow after the game has been on for 15 to minutes, even when pop is inactive. I did notice that the fuse wasn't a little loose in the clips so I squeezed the clips to tighten up the fuse.
Are the connector pins for the driver board still available? I'm also wondering if somebody reversed the wires at the coil since it's apparent that the coil was changed. This game has been HUO since the late 80's.