LG 32LG710H Service Manual page 52

AV/Component/RGB-PC Audio(in) Trouble shooting guide
Check JK1701, JK1702, JK1703, JK704.
Can you see the normal waveform?
YES
Check the input (Pin AC8,AB9,AF6,AE7,AF7,AE9,AB10,AD10)
of BCM3549((IC100).Measure waveform at
C1004,C1005,C1006,C1007,C1008,C1009,C1010,C1011
because it's more easy to check. Can you see the normal waveform?
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Only for training and service purposes
NO
JK1701, JK1702, JK1703, JK704. may have problem. Replace this Jack.
NO
After checking audio signal line, you should decide to replace item or not.
LGE Internal Use Only