Samsung PN51E490B4FXZA - Manual (Page 106)

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English
Min Cell Light : When Eco Sensor is On , lets you manually adjust the
minimum screen brightness.
N If Eco Sensor is On , the display brightness may change (become slightly
darker in most cases) depending on the surrounding light intensity. You
can control the screen’s minimum brightness with the
Min Cell Light
function.
●
No Signal Power Off (Off / 15 min. / 30 min. / 60 min.) : Sets how quickly
the TV switches to standby mode if it is receiving no 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 control or touch a button on TV’s front panel within 4
hours.