Electromechanical machines get new coil sleeves, rebuilt score reel units, and rewound solenoids when a stop pin has been chewed through. Solid-state machines get socketed chip replacement, cracked solder joint rework under a microscope, and driver transistor swaps when a playfield feature stops firing.
Backglass work is done in-house: touch-up on lifted paint, foil repair behind cracked glass, and full re-silkscreen when a panel is too far gone to save. Cabinets get side-art restoration and coin door refurbishment alongside the electronics.
Modern machines with networked scoring and LCD backboxes are diagnosed board-level with a scope and a bench supply, the same as anything older - the tools change, the fault-tracing does not.
