Eliminating interference between monitors

If you have monitors that aren't shielded well against magnetic fields, you may see a horizontal line wandering up or down the monitor, or some sort of moving wave pattern.

To fix the problem, try different refresh rates. If the monitors use different refresh rates, interference is less likely to affect the display. If that doesn't help, you'll have to move the monitors further apart or put a shielding material between them. The ideal material is a thin nickle alloy sheet called mu-metal, available from LessEMF.com.

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