Samsung UN46ES7500FXZA E-Manual page 238

you use TV.
by default. Turn off
adjust its volume.
●
Panel Lock
Lock or unlock all the keys on the front
panel at once. When
none of the keys on the front panel
operate.
●
Boot Logo
Displays the Samsung logo when the
TV is turned on.
Sound Feedback
Sound Feedback
is enabled
Panel Lock
or
is on,