LG 75XE3C Owner's Manual page 31

Make sure to read the Safety Precautions before using the
product.
The model and serial numbers of the SET are located on the
back and one side of the SET. Record it below should you ever
need service.
MODEL
SERIAL NO.
Supplier's Declaration of Conformity
Trade Name LG
Responsible LG Electronics USA, Inc.
Party
Address 111 Sylvan Avenue, North Building,
Englewood Cliffs, NJ 07632
E-mail lg.environmental@lge.com
Temporary noise is normal when powering ON or OFF this
device.