Direct answer
HDMI signal path carries negotiated video, audio and control data. Related symptoms include no signal, black screen, flicker, missing HDR/4K120 or audio. Those symptoms do not prove the component failed: test one known-good cable directly before advanced settings.
What this covers
- TVs, streamers, consoles and audio systems
- The exact condition described in the title
- Customer-accessible checks before internal repair or reset
What it does not cover
- ×A different brand, model family or similar-looking code
- ×Internal live-electrical, gas, refrigerant or sealed-system testing
- ×A guarantee that a named component has failed without isolation
Capture the exact state
ReversibleRecord the model, exact code, operating stage and whether the product completes the action this component supports.
Separate the likely fault domains
Reversibletest one known-good cable directly before advanced settings.
Correct only the proven, accessible condition
ReversibleCorrect the external prerequisite first. Replacement difficulty is isolate cable, port, intermediary or format; damaged ports need service.
Verify once before going farther
ReversibleRepeat the same controlled stage and confirm the symptom and stored code stay gone.
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 record first for “HDMI signal path: function, symptoms, testing boundary and repair difficulty”?+
Record the model, exact code, operating stage and whether the product completes the action this component supports.
Does the symptom or code prove a part has failed?+
No. test one known-good cable directly before advanced settings.
When should I stop troubleshooting?+
Stop for hot connectors, bent pins or damaged mains equipment.
Answer for the exact device and software version shown above.