Samsung UE65AU6905KXXC E-Manual page 231

If the test reveals a problem, select
Settings
If the test shows no problems, select
Information.
If the test shows no problems, select
Information.
Sound
Sound
Expert Settings
Settings Sound
Settings
Support
Device Care
Support
Settings
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Expert Settings
Support Device Care
Support Device Care
Reset Sound.
Self Diagnosis Signal
Self Diagnosis Signal