LG 47LD650 Owner's Manual page 115

Picture Test/Sound Test
This function is a customer support function that can execute picture and sound tests.
1
MENU
5('
or
H
ome
2
ENTER Select Picture Test or Sound Test.
3
Select Yes.
ENTER
4
Return to the previous menu.
BACK
Return to TV viewing.
EXIT
Select Customer Support.
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