Direct answer
A complete failure should be separated into power or eligibility, the external path, and the component itself before any reset. For active noise cancellation, first test in steady fan noise with clean microphones and several tip sizes.
What this covers
- active noise cancellation with this exact failure state
- Diagnosis across ear-tip seal and mode versus wind, microphone obstruction and hardware
- Customer-accessible observation, settings and external components
What it does not cover
- ×A displayed manufacturer error code with a different documented meaning
- ×Live electrical, sealed-system, internal battery-cell or gas repair
- ×A claim that every model exposes identical controls
Capture the exact failure state
ReversibleRecord whether the feature is absent, disabled, powered but unresponsive, or showing a message. Expected behavior: reduce steady low-frequency noise with a sealed fit and calibrated microphones.
Isolate the component boundary
ReversibleTest in steady fan noise with clean microphones and several tip sizes. Test the simplest supported configuration with unrelated accessories and optional services removed. Boundary to separate: ear-tip seal and mode versus wind, microphone obstruction and hardware.
Correct only the proven cause
ReversibleRefit, recalibrate or service the side that does not cancel. Restore only the failed prerequisite or path; do not change working layers.
Verify and stop safely
ReversibleRepeat from a cold start and complete one normal use. Stop for painful pressure, loud feedback, liquid or damaged microphones.
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 first when active noise cancellation has this problem?+
Test in steady fan noise with clean microphones and several tip sizes.
Why not factory-reset immediately?+
The useful boundary is ear-tip seal and mode versus wind, microphone obstruction and hardware. A reset can erase state without proving which side failed.
When should I stop troubleshooting?+
stop for painful pressure, loud feedback, liquid or damaged microphones.
Answer for the exact device and software version shown above.