Electromagnetic emissions (EMI) from arcade machines can interfere with nearby electronics and even affect gameplay quality. To minimize these emissions, consider the following effective methods:

1. EMI Shielding: Use conductive materials like copper or aluminum foil to shield sensitive components and cables, blocking unwanted radiation.

2. Proper Grounding: Ensure the machine is correctly grounded to dissipate excess electrical noise and reduce interference.

3. High-Quality Components: Replace old or low-quality wiring and power supplies with shielded cables and filtered power sources.

4. Ferrite Cores: Attach ferrite beads to power and video cables to suppress high-frequency noise.

5. Regular Maintenance: Clean and inspect internal components to prevent dust buildup, which can exacerbate EMI issues.

By implementing these strategies, you can significantly reduce electromagnetic emissions and improve the reliability of your arcade machine.