The game resets on its own during play, often intermittently.
Random resets from cracked joints on power supply filter capacitors
Cause: The big filter capacitors on the upright power supply board shake with game vibration until their solder joints, and often the plated-through holes under them, crack. Cold joints on the bridge rectifiers do the same.
Checks
- With power off, inspect the filter capacitor and bridge rectifier leads on the back of the power supply board for rings or cracks in the solder.
- Gently wiggle each tall capacitor; any movement or a change in the reset behaviour points to a bad joint.
Fix
- Remove the board and reflow the capacitor and bridge rectifier joints with fresh solder.
- Where a plated-through hole has failed, solder the lead on both sides of the board or bridge the broken trace with wire.
Unplug the game before working on the power supply board; it carries line-derived voltages and large filter capacitors can hold a charge.
Systems
Source: Capcom Pinball Problems/Solutions