Samsung UN46ES8000 E-Manual page 20

The p cture s good but there s no sound_,
Set the Speaker Seect
option to
TV Speaker
in the Sound menu.
if you are using an external device, check
the device's audio output option, (Ex,
You may need to change your cable box's
audio option to HDM! if you have the box
connected to your TV using an HDM! cable,)
if you are using a DVI to HDMI cable, a
separate audio cable is required.
if your TV has a headphone jack, make sure
there is nothing plugged into it.
Reboot the connected device by