LG 19LG31 Service Manual page 14

4. No sound
Start Check
Check the input
Source.
Pass
Check input/Output
of IC100.
Pass
Check the input/
output of IC500.
Pass
Check the Speaker.
Pass
Check the Speaker wire.
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Only for training and service purposes
Fail
Change source input.
Fail
Re-soldering or change the defect part.
Check the X100.
Fail
Re-soldering or change
the defect part.
Fail
Change the speaker.
- 14 - LGE Internal Use Only