Arcade machine monitors, particularly older CRT models, are highly susceptible to yoke magnetization which causes persistent color distortion and image purity issues. The most effective prevention method involves regular degaussing using a professional degaussing coil, creating an alternating magnetic field that neutralizes accumulated magnetism. Strategic cabinet placement proves crucial—position machines at least three feet from power transformers, speakers, and other arcade units emitting strong magnetic fields. Implementing magnetic shielding around the yoke assembly using mu-metal sheets provides permanent protection against external magnetic interference. Proper grounding of all monitor components prevents static charge buildup that can exacerbate magnetization. For persistent cases, rotating the cabinet 90 degrees and power cycling the monitor multiple times can utilize the built-in degaussing circuit. Preventive maintenance should include quarterly degaussing sessions and immediate attention to any color abnormalities. Modern solutions include installing aftermarket automatic degaussing systems that activate during power-up sequences. Understanding these techniques ensures vibrant, distortion-free displays while preserving authentic arcade visual quality.