LG RZ-20LZ55C Service Manual page 20

No Sound
Check the
input source
Check the input/output
of IC1
Check the input/output
of IC100,IC101
Check the speaker
Check the speaker wire
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Only for training and service purposes
Pass
Pass
Pass
Pass
Fail
Fail
Fail
Fail
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Change source input
Re-soldering or
Change the defect part
Check X11
Re-soldering or
Change the defect part
Change speaker
LGE Internal Use Only