Pole Position would be way better if they had built a serperate connector for the power, one that was capable of handling the current required by the boards.
Off topic slightly:
Data East pinball power supplies. The header pins for the input from the transformer (IIRC) like to burn up and people like to solder the wires directly to the PCB, making it a bitch to remove for repair and replace afterwards.
WPC/WPC95 based Williams/Bally pins. The power driver board has reset problems when the solder connections in one of the rectifier sections go bad. I refer to it as the "Double Flipper Reset" as the game seems to work fine unless both flipper coils are engaged at the same time. If that happens, the whole game resets. The bitch part of it comes in removing the 10,472 connectors (its much closer to 20 but seems like a lot more) and taking the board out of the head, not to mention putting it back in later.
Back on topic.
Atari's Big Blue Cap. While relatively easy to replace, it seems to be the cause of a large number of problems. You can't really blame it, though. Caps just go bad, especially after 28 years, just a PITA.