LG 55LA690T Owner's Manual page 25

Method B: dVI to HdMI Connection
Choose any HDMI input port to connect.
It does not matter which port you use.
P
VIDEO/Y P
B R
L/MONO AUDIO R
PC-AUDIO IN
(*Not Provided)
(RGB/HDMI-PC)
(PC) (PC) (RGB/HDMI-PC)
AUDIO
RGB RGB
AUDIO
MAKING CONNECTIONS
(*Not Provided)
AUDIO OUT
DVI OUT
PC
25