LG RZ-15LA66 - No Sound Troubleshooting

No Sound
Check the speaker wire
Change source input
Check the
input source
Fail
Pass
Re-soldering or
Change the defect part
Check X11
Check the input/output
of IC1
Fail
Pass
Re-soldering or
Change the defect part
Check the input/output
of IC100,IC101
Fail
Pass
Change speaker
Check the speaker
Fail
Pass