Samsung PN51E550 E-Manual page 47

start the follow these
1. Go to the A_to menu.
2. Select :: or ,::: 3: :::::; or both, a nd then
select
A mark
appears
in
the check box.
If
you
Ai,:_Or_ in the
your
choice will
already be selected°
3. If you selected Csbi_:, the cable
system screen appears. Select D:9