No power, or no game start, after the coin door has been disconnected.

Game won't power up or start with the coin door unplugged

Cause: Many games (Gottlieb and Bally in particular) route power or the start circuit through the coin door wiring.

Checks

• Confirm the coin door plug is mated and no coin door wire is broken.

Fix

• Reconnect or repair the coin door cable.

Systems

• Electro-mechanical

Related tips

• Gottlieb game does nothing: coin door connector

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)