Fluorescent lights, other monitors, or electronic appliances such as coffee makers and copy machines can cause raster distortion. Move the unit to another room or building to help determine if external interference is the source of the problem.
Note: If the raster has shifted up/down or right/left only, adjust it using the user controls. However, keep in mind that if you then move the monitor you may need to readjust the centering controls.
If the display changes (for better or worse) when you move it to another location, the environment is the source of the problem. Relocate the monitor or move the distortion-causing object.
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