Quoted from Hawk007:Thats 4 bad chips on this board so far to get it this far along.
Hmmmm....If this board was in a game that got the playfield connectors mixed up, it's possible that not only did a bunch of chips fry, but also the little bypass filter caps next to each chip.
I think they are .01mfd, but check my math, cuz I'm on my phone.