I got a Big Brave playing up and driving me nuts. I'm waiting for a schematic & manual from PBR but I got no patience so I thought I'd ask here. The game will start off the coin switch or replay button, go through the reset score reel sequence and then the player unit will go to the home position. Then, just before the reset bank coil fires, ball 1 lights up for a second on the bg. The, as the reset bank resets, the game immediately goes to game over. It did function for about six games this morning, but now it won't. I'ts been working / not working for the last few days, so it must be a dodgy switch, solder lug or something. I've done all the score reels, checked & checked again. I've gone through the player unit cam switch stacks, gone through everything on the motor board & again. The hold relay doesn't lock in and the game over & first ball relay won't reset. If I try to reset the bank manually with the game on and gone to game over, their relays immediately energize and so they can't be reset. The game over light is on. The ball count only lights when the game does start properly, when it plays a game fine. Any ideas where to look?

Sorted.