Why is there a horizontal line or wire visible across the monitor screen?
This is normal because this CRT monitor uses a thin damper wire, located approximately 2.5 inches down from the upper bezel edge and 2.5 inches up from the lower bezel edge, to stabilize the internal aperture grille. These wires are most obvious when the monitor displays a white background. The aperture grille allows more light to pass through the screen for brighter colors and greater luminescence. The damper wire is a critical part of the overall monitor design and does not negatively affect the monitor’s function. Note: This only applies to some cathode ray tube (CRT) monitors, not LCD monitors. A line across an LCD monitor screen is due to damage or defect and can be located anywhere on the screen, not in specific locations as stated above.
