Samsung LT27A750ND-ZA - Manual (Page 122)

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● No Signal Power Off ( Off / 15 min. / 30 min. / 60 min. ): To avoid unnecessary
energy consumption, you can set how long you want the TV to remain on if it’s
not receiving a signal.
N Disabled when an attached PC is in power saving mode.
● Auto Power Off ( Off / On ): Saves power by turning the TV off automatically if
you dont' press a button on the remote or otherwise operate the TV within 4
hours.