Samsung UE55KS7500 E-Manual page 89

The problem
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.
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.
Change the Use Mode (
to Home Use.
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 utilises 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!
Settings System Expert Settings Use Mode)