LG 65UX970H Service Manual page 34

10. Audio out Trouble shooting guide
Check the output of Main IC(IC101).
Measure waveform at IC5800(Pin7, 8, 10, 11, 14).
because it's more easy to check.
Can you see the normal signal?
YES
Check Audio AMP output
L5802,L5803,L5804,L5805
Can you see the normal waveform?
YES
Check the speaker output wafer P5800.
Can you see the normal waveform?
YES
Check the connector & Speaker
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This board has big problem
NO
because Main chip (LM15U) have some troubles.
After checking thoroughly all path once again,
You should decide to replace LM15U or not.
NO
After checking the Power & I2C & Reset of this chip,
you should decide to replace this or not.
NO
After checking audio signal line,
you should decide to replace item or not.
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