Arcade machines are designed with various fail-safe mechanisms to ensure smooth operation and prevent damage or accidents. Here are the most common types:

1. Coin Mechanisms: These prevent counterfeit coins from being used and ensure only valid currency activates gameplay. Sensors detect weight, size, and material to reject invalid coins.

2. Power Protection: Surge protectors and voltage regulators safeguard the machine from electrical spikes, preventing damage to sensitive components.

3. Emergency Stops: Many arcade cabinets feature emergency stop buttons to instantly cut power in case of malfunctions or safety hazards.

4. Overheat Protection: Cooling fans and thermal sensors prevent overheating, especially in machines with high-performance hardware.

5. Tilt Mechanisms: Found in pinball machines, these detect excessive shaking or tilting, disabling the game to prevent cheating or damage.

These mechanisms ensure arcade machines remain reliable and safe for players, preserving both the hardware and the gaming experience.