Direct answer
Intermittent HDMI loss is usually a cable-bandwidth, port, power or format-handshake problem. Test a direct, shorter signal path before changing every picture setting.
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
ReversibleRecord whether the screen goes black, shows No Signal, loses audio too, and whether it follows 4K/HDR or frame-rate changes.
Run the smallest isolation test
ReversibleConnect the source directly to the TV with a known-certified cable and test a different TV input.
Correct only the proven cause
ReversibleReplace the failed cable/path or temporarily lower output format to identify a bandwidth limit; update both devices afterward.
Verify before changing anything else
ReversibleRun the same program for at least ten minutes with no receiver or switch in the path.
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?+
Record whether the screen goes black, shows No Signal, loses audio too, and whether it follows 4K/HDR or frame-rate changes.
What is the safest isolation test?+
Connect the source directly to the TV with a known-certified cable and test a different TV input.
When should I stop troubleshooting?+
Stop for a hot connector, bent port, sparks or signal loss that follows moving the fixed TV socket.
Answer for the exact device and software version shown above.