LG DM2350D Owner's Manual page 90

To return to initial settings
❐
SETTINGS➾
Returns to initial default mode by deleting all optional setup.
Once initialization is completed, the TV will turn off and on by itself.
✎ When Lock System
password.
✎ Do not turn off the power during initialization.
OPTION ➙ Initial Setting
is in place, a pop-up window appears and asks for