LG 49WEC-C Owner's Manual page 51

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
To obtain the source code under GPL, LGPL, MPL, and
other open source licenses, that is contained in this
product, please visit http://opensource.lge.com .
In addition to the source code, all referred license terms,
warranty disclaimers and copyright notices are available
for download. LG Electronics will also provide open
source code to you on CD-ROM for a charge covering
the cost of performing such distribution (such as the
cost of media, shipping, and handling) upon email
request to opensource@lge.com . This offer is valid for
three (3) years from the date on which you purchased
the product.
Temporary noise is normal when powering ON or OFF
this device.