Samsung UE19ES4000W E-Manual page 110

Auto Protection Time
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for LCD, LED TV
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System Auto Protection Time
O
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Auto Protection Time (Off / 2 hours / 4 hours / 8 hours / 10 hours): If the
screen remains idle with a still image for a certain period of time defined by the
user, the screen saver is activated to prevent the formation of ghost images
on the screen.
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