Samsung PN59D6500DFXZA - Manual (Page 130)

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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 ): The TV will automatically turn off if you don’t press
a button on the remote or touch a button on TV’s front panel within 4 hours to
prevent overheating.