degauss

/diːˈɡaʊs/
verb
  1. To remove or neutralize a magnetic field from something, especially a computer monitor or other electronic device.
    • Before shipping the hard drive, the company will degauss it to erase all data securely.
    • You should degauss the screen if you see strange rainbow patterns on it.
    • The technician used a special tool to degauss the old CRT monitor and fix the color distortion.
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