Illuminated Arcade Button Not Lighting Up? Separate the Two Circuits

The game responds to the button, but the face stays dark. Or the face glows normally while a press does nothing. An illuminated button often combines a switching function with a separate lighting function, so one can work while the other fails.

Before replacing the complete assembly, identify which function is faulty. A product illustration can help you recognise the components, but it is not a wiring diagram. Use the terminal markings and documentation for the actual button and cabinet.

Check whether the game sees the press

With the cabinet closed, use the documented input test or normal operation. If the press registers consistently, focus the diagnosis on the lamp, holder, supply and lighting control. If the lamp works but the input does not, follow the button and microswitch troubleshooting guide.

If neither function works, do not immediately assume both parts have failed. Check the service history and the connections shown in the machine manual. A recent panel replacement or disconnected harness may be relevant.

Identify the lamp and switch terminals

Disconnect cabinet power before opening the panel or handling terminals. Photograph the complete assembly and label the connections. Identify the switch contacts separately from the lamp connections. Their location and number vary between designs.

Do not apply a lamp supply to a game input. Do not use the switch's electrical rating as the lamp's operating voltage. A marking on a microswitch describes that switch, not necessarily the illumination fitted beside it.

Some assemblies use replaceable lamps; others use an LED module or integrated lighting. For example, SUZOHAPP's illuminated-button documentation lists specific button and LED-light assemblies. The appropriate replacement depends on the exact construction.

Check the simple mechanical causes

With the system unpowered, inspect for a lamp holder that is not fully seated, a loose connector, damaged insulation or a terminal pulled sideways by tight wiring. Remove and refit parts only by the manufacturer's method. A retaining clip is not always released by pulling harder.

Inspect the lens and surrounding housing too. Heat damage, distortion or a broken holder can justify replacing more than the lamp. Do not keep using an assembly with visible damage until the underlying cause has been assessed.

Confirm the electrical requirements

Match the lamp or module's supply type, rated voltage and any polarity requirement. For LED products, determine whether the module includes the required current-limiting components. Do not assume a bare LED and a rated lamp module can be connected in the same way.

If the lighting is controlled by the machine, a dark button may be correct in the current game state. Check its documented lamp test. Supply and driver measurements should be handled by someone qualified to test the powered cabinet safely. Keep the part replacement itself unpowered.

Order by fit as well as voltage

The Amuseparts rectangular illuminated button has a 51 by 33 mm outer face and a listed installation depth of 48.5 mm below the bezel. The face size is not the mounting-hole size. Confirm the panel opening, terminal clearance and the lamp voltage before installation.

Our product information does not specify the lamp voltage or switch electrical rating for that assembly. If those details are missing from your current part too, send the cabinet model and photographs for a compatibility check rather than choosing a voltage by appearance.

Test the two functions separately after repair

Reassemble the panel, check clearance and close the cabinet as instructed. Run the input test and the lamp test. Then check the button during normal play, including the states in which its light should change.

Record the lamp specification with the spare parts. Keeping "button switch" and "button lighting" separate in the repair log makes future faults quicker to diagnose and prevents replacing a working component twice.