The game will not start, will not boot, or acts tilted or slam-tilted, often after someone pressed the coin switches by hand.

Game will not start or acts tilted after adding credits by hand

Cause: The coin lockout wire has been pushed against a coin switch blade, grounding a switch matrix line.

Checks

• Look at both coin switches and make sure the lockout wire is clear of the blades.

Fix

• Bend the wire clear and keep the insulating fish paper in place.

Systems

• Gottlieb System 1

Source: Gottlieb System 1 Pinball Repair from 1977 to 1980, Clay Harrell (pinrepair.com)