Direct answer
Lip-sync error can originate in one app, an HDMI device, Bluetooth, a soundbar or TV processing. Find the boundary before moving delay sliders.
What this covers
- The observed symptom matches this record
- Customer-accessible settings, connections and external components
- Diagnosis before reset, deletion or component replacement
What it does not cover
- ×A model-specific error code with a different documented meaning
- ×Internal electrical, battery-cell, gas, refrigeration or sealed-component repair
- ×A guarantee that every model exposes the same control label
Capture the exact symptom
ReversibleCompare TV speakers, the sound system and a built-in app using the same spoken scene.
Run the smallest isolation test
ReversibleBypass Bluetooth and connect the source directly; disable extra motion/audio processing for one test.
Correct only the proven cause
ReversibleApply delay only on the device common to every failing source, or update/reconnect the one failing app or HDMI device.
Verify before changing anything else
ReversibleConfirm live speech stays synchronized after channel changes and after restarting the devices.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I check before resetting anything?+
Compare TV speakers, the sound system and a built-in app using the same spoken scene.
What is the safest isolation test?+
Bypass Bluetooth and connect the source directly; disable extra motion/audio processing for one test.
When should I stop troubleshooting?+
Stop if audio drops, crackles or the receiver reports an HDMI or thermal fault.
Answer for the exact device and software version shown above.