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4. Sound problem
No sound or sound abnormal
Check the TV is muted, adjust the
volume or enter the menu to reset?
Reinsert the audio cable or
change the TV system
Replace the cable
Replace the speaker
Replace the main board
No
Yes
No
Check the cable between the
speakers and main board is ok?
Check the speaker resistance value is in spec
(Remark: The value is marked on the speaker)?
Check the audio source connection
and the TV system are correct？
Yes
No
No
Yes
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