Samsung UN46ES7500FXZA E-Manual page 632

The Channel
when you select the TV source.
Your settings are lost after 30 minutes or
every time the TV is turned off.
If the TV is in the
it will reset audio and picture settings
every 30 minutes. Change the settings
from
mode using the
TV in the
and go to
menu is only available
Store Demo
Source
System
Store Demo
mode to
Setup procedure. Select
using your remote,
→ Setup.
mode,
Home Use