LG 24LN451B Service Manual page 19

7. 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
Check R870 Voltage Level (3.3V)
Y
Check Signal from IC700
L700,L701, L706, L709
Y
Check Signal from IC101
SDA/SCL
(R703/R214, R707/R213)
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N
Replace connector or Speaker
N
Replace IC807(3.3V)
N
Replace IC700
N
Replace IC101
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