Samsung UA40ES6200R E-Manual page 624

ΠLoss 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 mounting the TV to the wall, we
recommend using cables with 90
degree connectors.
You see small particles when you look
closely at the edge of the frame of the TV.
ΠThis is part of the product's design