Samsung un78hu9000 E-Manual page 208

The Problem
Broadcasting
The option
has been deactivated.
The settings are lost
after 30 minutes or every
time the TV is turned off.
There is an intermittent
loss of audio or video.
There are small particles
on the TV's bezel.
The PIP menu is not
available.
A POP (TV's internal
banner ad) appears on
the screen.
The TV is making a
popping noise.
The TV is making a
humming noise.
Broadcasting
is only available when the
Broadcasting
The menu cannot be accessed while you watch TV using a cable
box or satellite receiver.
Use Mode
If the is set to
automatically reset every 30 minutes.
Use Mode (Support
Change the
Check the cable connections and reconnect them.
Loss of audio or video can be caused by using overly rigid or thick cables.
Make sure the cables are flexible enough for long term use. If you are mounting
the TV to a wall, we recommend using cables with 90-degree connectors.
This is part of the product's design and is not a defect.
PIP
functionality is only available when you are viewing video from an HDMI or
Component source on the main screen.
Use Mode (Support
Change the
The expansion and contraction of the TV's outer casing may cause a popping
noise. This does not indicate a product malfunction. The TV is safe to use.
Your TV utilizes high-speed switching circuits and high levels of electrical
current. Depending on the TV's brightness level, the TV may seem slightly
noisier than a conventional TV.
Your TV has undergone strict quality control procedures that meet our
demanding performance and reliability requirements.
Some noise coming from the TV is considered normal and is not an acceptable
cause for an exchange or refund.
Try this!
Source
Store Demo, the TV's audio and video settings are
Use Mode) to
>
Use Mode) to
>
is set to TV.
Home Use.
Home Use.