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32LG300C (CHASSIS:LD85A) - LG TV Service Manual (repair manual). Page 20

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Check the input source.
Check the speaker wire.
No
Re-solder or replace the IC100.
No
Re-solder or replace the IC1001.
No
Replace the external speaker
No
Yes
Check the input
source?
Yes
IC100 operate
normally?
Yes
IC1001 operate
normally?
No
Check the external
speaker
11. Don’t operate the external speaker out
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