LG DM2352D-PZN Service Manual page 22

8. No Audio
Make sure you can't hear any audio and
Device support the audio signal normally.
Y
Check Speaker and
its wire connection (P700)
and the resistance
Y
1.Check C820 Voltage Level (19V)
2. Check Audio Amp(IC700) Power (3.3V)
Y
Check Signal from IC700
L702,L703, L704, L705
Y
Check Signal from IC101
SDA/SCL
(R703/R214, R707/R213)
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Only for training and service purposes
N
Replace connector or Speaker
N
Replace IC700(19V), IC2602(3.3V)
Or Adapter
N
Replace IC700
N
Replace IC101
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