Game won't start or behaves as though coins keep arriving.

Game won't work because a coin switch is stuck closed

Cause: A coin mech switch in the coin door is stuck closed. Common on Williams.

Checks

• Inspect each coin mech switch with the door open.

Fix

• Free and re-gap the switch so it is open with no coin present.

Systems

• Electro-mechanical

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