I love fixing EMs... its what i started out doing 20 odd years ago going in blind on my first pinball machine.. had her fixed in an afternoon.
I also enjoy trying to help others on this forum with their EM fixes. Its like a challenge to me as i dont have the machine here to work on and i find it VERY satisfying when a member has been pointed in the right direction and has got their machine up and running.
If i get really stumped.. i might look at the schematics..LOL