Haptics solenoids do not fire

Useful Answer

When haptics audio/vibration works but the clicking solenoids do not fire, separate the issue into firmware, signal, wiring, and solenoid hardware.

Confirm baseline versions and behavior:

• Controller firmware should be v3.62 or newer; this case used v3.64.
• Gen2 dongle should be paired correctly; this case used dongle v3.43.
• Haptics PCB firmware should be current; this case used PCB v1.8.
• Confirm the base controller works normally without the haptics kit connected.
• Confirm sound, vibration, and plunger behavior separately from solenoid behavior.

Check serial cable orientation between the haptics kit and controller PCB. Looking directly at the PCB, the single-wire connector should be on the left and the two-wire connector should be on the right.

Before replacing parts, reseat the solenoid and nearby connectors. A loose internal connection can happen during shipping or installation; one resolved case started working again after the customer removed and reinstalled the affected solenoid. Yellow residue or discoloration around connectors is usually manufacturing adhesive, not proof of a hardware defect.

If both flipper solenoids stop firing and cooldown does not restore them, inspect the mechanical rods that sit inside the solenoid blocks. A resolved case found that the rods had threaded loose/out of position on both sides; pushing them back in and tightening the threaded ends restored the solenoids. If the rods spin loose again during play, treat it as a mechanical assembly issue that needs proper securing or replacement, not just an electronics failure.

If the cable orientation is correct, test the solenoids directly. With a 12V adapter or bench supply, briefly tap 12V power to the solenoid terminals:

• If the solenoid fires from direct 12V, the solenoid hardware is good and the issue is likely board output, signal, or power delivery.
• If it does not fire from direct 12V, the solenoid or its cable may be faulty.
• Use quick taps only. Do not hold power continuously on the solenoid terminals.

You can also swap left and right solenoid plugs on the internal haptics PCB:

• If the failure follows the solenoid to the new socket, suspect the solenoid or its cable.
• If the failure stays on the same PCB socket, suspect the haptics PCB output.

The solenoids are intended for mechanical feedback from flipper button presses. They normally do not fire for bumper hits, ball rolling, or other table physics events. Those events are handled by the audio-driven vibration motors instead. If vibration works during a heavy-bass audio test but not in-game, raise the game's physics/table sound volume.

Source Context

The customer had replaced boards and still had no clicking solenoids, while sound/vibration and other controller functions worked. Support used firmware confirmation, serial cable orientation, plug-swapping, and direct solenoid testing to isolate the failure path. Separate resolved cases showed that a single non-working flipper solenoid can recover after reseating/remounting the solenoid, and that both flipper solenoids can recover after loose threaded rods are reseated and tightened.