The game will not start, or ends the whole game suddenly.
Game ends or will not start: stuck slam or tilt switch
Cause: A slam (anti-cheat) switch on the coin door, cabinet floor or underside of the playfield, or the rolling-ball or plumb-bob tilt, is stuck closed (or open).
Checks
- Look at the plumb bob: it should hang centred without touching the ring.
- Find the rolling-ball tilt track and check the ball sits at the low end away from its switch (some old games use a mercury switch).
- Check each slam switch for bent blades touching.
Fix
- Recentre the tilt and re-gap the slam switch blades so they stay open at rest.
Systems
- Williams System 3
- Williams System 4
- Williams System 6 / 6A
- Williams System 7
- Williams System 9
- Williams System 11
- Williams System 11A
- Williams System 11B
- Williams System 11C
- WPC Alpha-Numeric
- WPC Dot Matrix
- WPC Fliptronics
- WPC DCS
- WPC-Security (WPC-S)
- WPC-95
- Bally MPU AS-2518-17
- Bally MPU AS-2518-35
- Stern MPU-100
- Stern MPU-200
- Bally 6803
- Gottlieb System 1
- Gottlieb System 80
- Gottlieb System 80A
- Gottlieb System 80B
- Gottlieb System 3
- Data East CPU Version 1/2
- Data East CPU Version 3
- Data East/Sega CPU Version 3b
- Capcom
- Electro-mechanical
Related tips
- Game check-out, part 6: switches, tilt and slam
- Game will not start: shorted switch or energised coil
- Cleaning leaf switch contacts
- Game stays in tilt
- Leaf switch gap and damping blade
Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)