This video shows you how to reset forgotten password in your LG smart WebOS TV and how to enter your new desired pin code.
Steps how to reset:
MENU ➡ SAFETY ➡ Highlight "TV RATING LOCKS"
Press
"Ch Up, Ch Up, Ch Down, Ch Up"
The sreen will pop-up with "MASTER PIN CODE"
Enter "0313"
Password will reset to the default value "0000"