LG LHD625 - Audio Output

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ELECTRICAL TROUBLESHOOTING GUIDE
5. NO AUDIO OUTPUT
No AUDIO output
IC601
PWM_3V3 OK?
Check IC105 pin3 supply 5.5 VA and pin2.
YES
YES
YES
YES
NO
X601
24.576 MHz OK?
IC700, IC701, IC702
36 V, 12 V OK?
IC601 pin19, 20, 21, 22, 23
I2C data OK?
IC700, IC701, IC702
pin4, 16, 18 OK?
Replace X601.
Check SMPS 36 V and IC104 12 V.
Check IC500 pin157, 161, 162, 160, 158.
Check IC100.
Replace IC700, IC701, IC702.
YES
YES
NO
NO
NO
NO