Article ID : 00024672 / Last Modified : 12/15/2010

A thin, gray horizontal line is visible on the Trinitron® television or computer monitor.

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A thin, gray, horizontal line may be visible on a Trinitron television or computer monitor when a light-colored background is displayed on the screen. This is a shadow of the aperture grille damper wire. The function of the damper wire is to keep the wires that make up the aperture grille from vibrating. This is normal and should not interfere with regular viewing.